Columns in a 2way Mirror Storage Space

Hi
I have a similar question like J_Rod: http://social.technet.microsoft.com/Forums/en-US/7a37e6ed-7e22-485c-a5d1-6460b2c4d63b/mimicing-raid-10-resiliency-with-storage-spaces?forum=windowsserverpreview
Why should I consider using more than 2 Columns in a 2 way mirror Storage Space? For me it makes little difference between a Storage Space with a 2 Column 2 Way Mirroring and a 6 Column 2 Way Mirroring on a 12 Disk Storage Pool (like in the Picture).
Apart from:
big write/reads which are processed by 6 disk in the 6 column configuration instead of 2 in the 2 column configuration
Filling of the disk is not synchron over all disk with the 2 column configuration
therefor i get exactly what I expect of the Storage Space when I use the 2 column configuration and try to achieve the same Result as a classic RAID10 (RAID 0 over X RAID1)

So when I create a 2 Column Mirror Storage Space can I be certain sure that I will have a disk configuration like:
Disk1 -- Disk2 -- Disk3 -- Disk4 -- Disk5 -- Disk6
Data1 -- Data1 - Data2 -- Data2 - Data3 -- Data3
So I could loose disk 1,3 and 5?
Or is there some other Magic in Storage Spaces?

Similar Messages

Custom column to show total remaining storage space for a host

I'm looking for a way to easily view the total amount of remaining storage space for a virtual host. At present, viewing the properties for a host in VMM is the only way to view this in the GUI. I was looking at sourcing a Powershell command to do this,
and then feed it into a custom column, for easy viewing within the VMM main window. This is probably best suited to the Powershell forums, but I placed the post here, as I may have overlooked another way to achieve this within VMM itself. Has anyone desired
for such a thing?
Many thanks.

I'm looking for a way to easily view the total amount of remaining storage space for a virtual host. At present, viewing the properties for a host in VMM is the only way to view this in the GUI. I was looking at sourcing a Powershell command to do this,
and then feed it into a custom column, for easy viewing within the VMM main window. This is probably best suited to the Powershell forums, but I placed the post here, as I may have overlooked another way to achieve this within VMM itself. Has anyone desired
for such a thing?
Many thanks.

Raid 1 Mirror Storage Spaces

Hello,
I create a Storage Spaces RAID 1 mirroring pool with two identical SATA Hard Disks. If I pull only ONE of the disks and connect it to another computer SATA connector with Windows 8 or Server 2012 installed OS, is the data readable on this computer?
If I put this disk on a hard disk enclosure (USB enclosure) am I be able to see the files on this disk, because doing mirroring in Windows 7 creates a dynamic disk that can't be connected afterwards on a USB enclosure in order to see the data on it. Has
this limitation been overcomed from Windows Server 2012.
Thank you

Hi,
I did that on my test machine. I can read database on the PhysicalDisk when attach it to another Windows Server 2012 computer.
Firstly, create a storage pool with two PhysicalDisks on a Windows Server 2012 computer. Then create a mirror virtual disk and new a volume save soma files on the volume.
After that, remove a PhysicalDisk from the first server and connect it to another Windows Server 2012 computer. System recognize the PhysicalDisk as a storage pool. The storage pool need to be set to read-write then attach virtual disk. In disk management,
set the virtual disk to online, then we could read the file on the saved on the PhysicalDisk.
As I did my test on my virtual machine and the PhysicalDisk is a virtual hard disk, you may need to do a test on your machine.
Regards,
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Storage Spaces Tiering Service running forever, killing user performance

I just installed a new Storage Server 2012 R2 OEM box, with a single mirrored storage space using 4x Samsung 840 Pro SSDs and 12x 3TB Toshiba 7200RPM HDDs. I used the wizard to configure this as a tiered space with a single large virtual drive, and it appears
to have configured with 2 columns and a 1GB writeback cache on the SSDs, as well as a proper tiering scheme between the SSDs and HDDs.
The scheduled task starts tiering maintenance at 10pm (I moved it back from 1am), and tiering runs all night with 100% disk activity at very low throughput (0.5 - 3.0 MBps), until I stop the Storage Spaces Tiering service in the AM when users arrive, as
they report bad storage response times while it runs - very little data is added to the disk during the day (say, 5 - 10GB), and usage patterns don't change much, so I'm curious as to why this is happening.
I've let the service run a few times over weekends, and it sometimes "finishes" a run, but the next night it will go right back to churning at low throughput and continue into the morning until a manual service stop.
Any ideas?

The below article talks about Performance of Storage Spaces , hope it's helpful.
http://social.technet.microsoft.com/wiki/contents/articles/15200.storage-spaces-designing-for-performance.asp
Here is more information about Storage Spaces Tiering :http://blogs.technet.com/b/josebda/archive/2013/08/28/step-by-step-for-storage-spaces-tiering-in-windows-server-2012-r2.aspx
http://blogs.technet.com/b/kevinremde/archive/2013/06/19/new-storage-tiering-coming-in-server-2012-r2-teched-2013-favorites.aspx
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Storage Space - Inaccessible, reconnect drives

Hi
My 2 HDD Mirror Storage Space is no longer accessible. I cannot see it in explorer, and under Storage Space Manager it says Inaccessible, Reconnect drives. Both disks under Physical Disks are displaying as OK, so I'm really scratching my head.
The results from
Get-PhysicalDisk | fl *
Get-StoragePool | fl *
Get-VirtualDisk | fl *
Any help here would be appreciated, really scratching my head. Even when I connect each of the single disks on their own they don't show up
Are as follows:
Usage                            : Auto-Select
OperationalStatus                : OK
HealthStatus                     : Healthy
BusType                          : USB
CannotPoolReason                 : In a Pool
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
MediaType                        : UnSpecified
ObjectId                         : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.Objec
                                   tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:PD:{772e2d6a-f0f7-11e1-be68-806e6f6e6963
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : USBSTOR\Disk&Ven_Seagate&Prod_Portable&Rev_0130\2GHY5YD1____&0:office-pc
AllocatedSize                    : 956435529728
CanPool                          : False
Description                      :
DeviceId                         : 2
EnclosureNumber                  :
FirmwareVersion                  : 0130
FriendlyName                     : Seagate Portable USB Device
IsIndicationEnabled              :
IsPartial                        : False
LogicalSectorSize                : 512
Manufacturer                     : Seagate
Model                            : Portable
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalLocation                 :
PhysicalSectorSize               : 512
SerialNumber                     : 2GHY5YD1
Size                             : 999385202688
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 4294967295
PSComputerName                   :
CimClass                         : ROOT/Microsoft/Windows/Storage:MSFT_PhysicalDisk
CimInstanceProperties            : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties              : Microsoft.Management.Infrastructure.CimSystemProperties
Usage                            : Auto-Select
OperationalStatus                : OK
HealthStatus                     : Healthy
BusType                          : USB
CannotPoolReason                 : In a Pool
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
MediaType                        : UnSpecified
ObjectId                         : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.Objec
                                   tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:PD:{795ec931-3b3a-11e2-be6d-00247e572b92
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : USBSTOR\Disk&Ven_Seagate&Prod_Expansion&Rev_0215\NA41HDPW&0:office-pc
AllocatedSize                    : 956435529728
CanPool                          : False
Description                      :
DeviceId                         : 1
EnclosureNumber                  :
FirmwareVersion                  : 0215
FriendlyName                     : Seagate Expansion USB Device
IsIndicationEnabled              :
IsPartial                        : False
LogicalSectorSize                : 512
Manufacturer                     : Seagate
Model                            : Expansion
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalLocation                 :
PhysicalSectorSize               : 512
SerialNumber                     :             NA41HDPW
Size                             : 999385202688
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 4294967295
PSComputerName                   :
CimClass                         : ROOT/Microsoft/Windows/Storage:MSFT_PhysicalDisk
CimInstanceProperties            : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties              : Microsoft.Management.Infrastructure.CimSystemProperties
Usage                            : Auto-Select
OperationalStatus                : OK
HealthStatus                     : Healthy
BusType                          : SATA
CannotPoolReason                 : Insufficient Capacity
SupportedUsages                  : {Auto-Select, Manual-Select, Hot Spare, Retired...}
MediaType                        : UnSpecified
ObjectId                         : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_PhysicalDisk.Objec
                                   tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:PD:{ad47423f-540b-5a97-e386-ceff1f53db31
PassThroughClass                 :
PassThroughIds                   :
PassThroughNamespace             :
PassThroughServer                :
UniqueId                         : SCSI\Disk&Ven_FUJITSU&Prod_MHZ2120BH_G1\4&33c29369&0&000000:office-pc
AllocatedSize                    : 120034123776
CanPool                          : False
Description                      :
DeviceId                         : 0
EnclosureNumber                  :
FirmwareVersion                  : 0084000A
FriendlyName                     : PhysicalDisk0
IsIndicationEnabled              :
IsPartial                        : True
LogicalSectorSize                : 512
Manufacturer                     :
Model                            : FUJITSU MHZ2120BH G1
OtherCannotPoolReasonDescription :
PartNumber                       :
PhysicalLocation                 :
PhysicalSectorSize               : 512
SerialNumber                     :         K60VT9226KWM
Size                             : 120034123776
SlotNumber                       :
SoftwareVersion                  :
SpindleSpeed                     : 4294967295
PSComputerName                   :
CimClass                         : ROOT/Microsoft/Windows/Storage:MSFT_PhysicalDisk
CimInstanceProperties            : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties              : Microsoft.Management.Infrastructure.CimSystemProperties
The two 1TB disks are the ones in the Pool.
Usage                             : Other
OperationalStatus                 : OK
HealthStatus                      : Healthy
ProvisioningTypeDefault           : Fixed
SupportedProvisioningTypes        : {Thin, Fixed}
ReadOnlyReason                    : None
RepairPolicy                      : Sequential
RetireMissingPhysicalDisks        : Auto
WriteCacheSizeDefault             : Auto
FileSystem                        : Unknown
Version                           : Windows Server 2012
ObjectId                          : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_StoragePool.Objec
                                    tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:SP:{47405101-f1b2-11e1-be68-00247e572b9
                                    2}"
PassThroughClass                  :
PassThroughIds                    :
PassThroughNamespace              :
PassThroughServer                 :
UniqueId                          : {47405101-f1b2-11e1-be68-00247e572b92}
AllocatedSize                     : 1912871059456
ClearOnDeallocate                 : False
EnclosureAwareDefault             : False
FriendlyName                      : StoragePool
IsClustered                       : False
IsPowerProtected                  : False
IsPrimordial                      : False
IsReadOnly                        : False
LogicalSectorSize                 : 4096
Name                              :
OtherOperationalStatusDescription :
OtherUsageDescription             :
PhysicalSectorSize                : 4096
ResiliencySettingNameDefault      : Mirror
Size                              : 1998770405376
SupportsDeduplication             : False
ThinProvisioningAlertThresholds   : {70}
WriteCacheSizeMax                 : 107374182400
WriteCacheSizeMin                 : 0
PSComputerName                    :
CimClass                          : ROOT/Microsoft/Windows/Storage:MSFT_StoragePool
CimInstanceProperties             : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties               : Microsoft.Management.Infrastructure.CimSystemProperties
Usage                             : Other
OperationalStatus                 : OK
HealthStatus                      : Healthy
ProvisioningTypeDefault           : Fixed
SupportedProvisioningTypes        : {Thin, Fixed}
ReadOnlyReason                    : None
RepairPolicy                      : Parallel
RetireMissingPhysicalDisks        : Auto
WriteCacheSizeDefault             : Auto
FileSystem                        : Unknown
Version                           : Windows Server 2012 R2
ObjectId                          : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_StoragePool.Objec
                                    tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:SP:{cef39ebf-7fba-11e3-8250-806e6f6e696
                                    3}"
PassThroughClass                  :
PassThroughIds                    :
PassThroughNamespace              :
PassThroughServer                 :
UniqueId                          : {cef39ebf-7fba-11e3-8250-806e6f6e6963}
AllocatedSize                     : 2000137748480
ClearOnDeallocate                 : False
EnclosureAwareDefault             : False
FriendlyName                      : Primordial
IsClustered                       : False
IsPowerProtected                  : False
IsPrimordial                      : True
IsReadOnly                        : False
LogicalSectorSize                 :
Name                              :
OtherOperationalStatusDescription :
OtherUsageDescription             :
PhysicalSectorSize                :
ResiliencySettingNameDefault      : Mirror
Size                              : 2120443895296
SupportsDeduplication             : False
ThinProvisioningAlertThresholds   : {70}
WriteCacheSizeMax                 : 107374182400
WriteCacheSizeMin                 : 0
PSComputerName                    :
CimClass                          : ROOT/Microsoft/Windows/Storage:MSFT_StoragePool
CimInstanceProperties             : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties               : Microsoft.Management.Infrastructure.CimSystemProperties
Usage                             : Other
NameFormat                        :
OperationalStatus                 : Detached
HealthStatus                      : Unhealthy
ProvisioningType                  : Thin
ParityLayout                      : Unknown
Access                            : Read/Write
UniqueIdFormat                    : Vendor Specific
DetachedReason                    : Incomplete
WriteCacheSize                    : 0
ObjectId                          : {1}\\OFFICE-PC\root/Microsoft/Windows/Storage/Providers_v2\SPACES_VirtualDisk.Objec
                                    tId="{cef39ebe-7fba-11e3-8250-806e6f6e6963}:VD:{47405101-f1b2-11e1-be68-00247e572b9
                                    2}{4740510d-f1b2-11e1-be68-00247e572b92}"
PassThroughClass                  :
PassThroughIds                    :
PassThroughNamespace              :
PassThroughServer                 :
UniqueId                          : 0D514047B2F1E111BE6800247E572B92
AllocatedSize                     : 955898658816
FootprintOnPool                   : 1911797317632
FriendlyName                      : Storage space
Interleave                        : 262144
IsDeduplicationEnabled            : False
IsEnclosureAware                  : False
IsManualAttach                    : False
IsSnapshot                        : False
LogicalSectorSize                 : 4096
Name                              :
NumberOfAvailableCopies           :
NumberOfColumns                   : 1
NumberOfDataCopies                : 2
OtherOperationalStatusDescription :
OtherUsageDescription             :
PhysicalDiskRedundancy            : 1
PhysicalSectorSize                : 4096
RequestNoSinglePointOfFailure     : False
ResiliencySettingName             : Mirror
Size                              : 998579896320
UniqueIdFormatDescription         :
PSComputerName                    :
CimClass                          : ROOT/Microsoft/Windows/Storage:MSFT_VirtualDisk
CimInstanceProperties             : {ObjectId, PassThroughClass, PassThroughIds, PassThroughNamespace...}
CimSystemProperties               : Microsoft.Management.Infrastructure.CimSystemProperties

They do not show up in Disk Manager. They're part of a Storage Space, and the Virtual Disk for said storage space is not attached for some reason. Please see the logs per above from the get-virtualdisk command, and see a brief version below
FriendlyName        ResiliencySettingNa OperationalStatus   HealthStatus        IsManualAttach
Size
                    me
Storage space       Mirror              Detached            Unhealthy
False                            930 GB

Storage Space with Photo Connector

Friends,
I have a 20gb u2 photo iPod. I'm using an ipod photo connector and it seems to only let me store about 2gb of photos when this is still like 12gb of free space on the ipod. What is the go with that?
Cheers
empiregordo

Hello Sean R,
Do you mean that you want to create a two way mirror storage space with 6TB space?
Based on my test, I create three VHD, two 4GB VHD and one 8 GB VHD.
And then try to create a two way mirror storage space. Please take a look at the following screenshot.
The total pool capacity is only 13.7 GB, so I can create a 8GB storage space with fault tolerant.
Best regards,
Fangzhou CHEN
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WIndows 8.1 Storage Space failing -- having trouble even getting information.

Hello,
I've looked at a bunch of articles to try to sort this out, but haven't found anything. I hope I'm just missing something obvious. :-/
Here's my setup: in addition to a system drive, I have three additional, identical disks (WD Red, 2TB) that I have placed in a storage pool. Out of these, I've carved three storage spaces: two set for mirroring, one for parity.
Something's gone awry... (or I wouldn't be here):
If I try to open up the "Storage Spaces" control panel, it just hangs. Task manager reports it as "not responding".
In PowerShell, running "get-virtualdisk" reported the OperationalStatus of the three virtual drives as InService for a while, but then started showing them as Degraded. Interestingly, these degraded disks seem to flip back to InService every so
often. The HealthStatus is always listed as Warning.
Running "get-physicaldisk", however, shows all three physical drives with an OperationalSatus of OK and HealthStatus of Healthy.
The system shows ~25% disk usage, making me thing that something is going on, but who knows...
I can browse into the two mirrored storage spaces, and things superficially look okay. I cannot open up the parity space.
I have an offsite backup through one of these cloud services, but it will be cheaper and faster to get this machine back on its feet rather than order up a copy of the backup.
So, wondering how to proceed here:
Are things clearly hosed?
If there is hope, what are the next steps in debugging/fixing this?
Thanks in advance!

Hi,
I suggest referring to the following link:
http://social.technet.microsoft.com/wiki/contents/articles/11382.storage-spaces-frequently-asked-questions-faq.aspx
Best Regards,
Vincent Wu
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Corrupted Storage Spaces Protective Partition

I am running Windows 8.1 pro build 9600
In addition to the boot and data drive, I had two internal 2TB drives set up to use all their available space as a mirrored Storage Space Protective Partition, which, before the problem below occurred, contained about 1600GB of -- you guessed it -- largely
un-backed-up data.
I thought that if one drive fails, the mirror will act as backup, while stupidly forgetting the possibility of file corruption or ransomeware.
So, while the computer was in 'sleep' mode overnight, there was a power cut, and when I tried to reboot, Windows automatic repair kicked in and said it could not fix the system. I managed to boot to command prompt, and diskpart reported both offending
1863GB GPT disks online, with no free space
MOUNTVOL reported that the offending volumes had *** NO MOUNT POINTS ***.
CHKDSK appears unable to work on an unmounted partition.
I could try EaseUS pro data recovery, but from previous experience this will take anything up to 3 or 4 full days, and will not repair the damaged mirror. However, I'm not sufficiently familiar with DISKPART to know if, for example, the RECOVER
option might be helpful, or if it might further mess up the file system, in which case a commercial data recovery like EaseUS may have more difficulty in sorting out the mess.
I'd be most grateful for some ideas about what to do next...

Thank you for your reply. Since my fist post, I have managed to start the PC from a duplicate boot partition set that I made after upgrading to 8.1.
Disk manager shows the disks as present, healthy, and marked as Storage pool.
However, all options are greyed out so I cannot assign a drive letter, and as before, MOUNTVOL reports
*** NO MOUNT POINTS ***.
The problem with the recovery apps I've tried so far is that after scanning either drive, they find the partition, but classify it as UNKNOWN. If I run the same apps on other disks they can recognise all the usual FAT, FAT32, NTFS, ext2, ext3, ext4 etc.,
but they don't seem to know about Storage Spaces Protective Partitions.
Do you know of some recovery app that understands this type of partition?
I know I can try getting the recovery app to read it as a RAW partition, but the problem there is that from previous experience I guess it will take 20 hours or so to run, and then not be able to build a useful directory tree.
There are probably 200,000 or so files on the partition, of which I only need to recover one folder in which there are about 400 files not otherwise backed up.

Storage Spaces data dispersion on new drive addition?

I've been playing around with SS for a couple days now and I like it, but I do have one question that I've not yet seen an answer to. I presume the answer tot he question is "yes", but I can't verify it.
Setup: Let's say I have an existing Pool of 2 1TB SSD, and out of them create a 2-way mirror SS of 500GB. I then write 200GB of data to this new 2-way mirror SS.
Q: If I immediately pull one of the 2 SSD out of the computer, presumably I would still have access to the 200GB of data from the remaining SSD? Also, if I plug that removed SSD into a different Windows 8 PC (or server 2012), I could mount that Pool (and it's
500GB SS) in the new OS and get to the data?
Setup: Same Pool back in the original setup from above, with 200GB data written to the 2-way SS. Now I add a third 1TB SSD to the Pool. I then write an additional 200GB of data to the 2-way mirror SS, for a total of 400GB of data in the 500GB SS.
Q: If I remove the newest SSD from the computer and plug it in on a new Win8 PC and mount the Pool/SS, will all 400GB of data be available?
Q: If both of the original SSD are disconnected (or die), leaving only the newest SSD in there, will the newest 1TB SSD have ALL of the 400GB of data?
What I'm getting at is: How does the Pool handle distributing data among the various drives, and does it continually move data around so that, in this case, the 2-way mirror Storage Space is making sure each drive has a working copy of the data in case it
is the last drive standing?
My hope is that it is indeed doing this. It would suck to find that devices added to the Pool after it has been in use for a while does not have a copy of the data written to a SS before it was added.

Thanks. Further research revealed that, so far, SS doesn't continually move data around. This makes your data vulnerable if you add and remove drives. I set up two 2TB HDD and pooled them together. Out of this one pool I will make the one ro two SS I wanted.
One will be a 2-way mirror with REFS, which I am interested in logging time with. But I do not plan to add any more drives, and there 2 drives will forever be paired up specifically for my Storage Spaces experimentation.
I found a fairly well known $20 software package that actually does everything I had hoped SS would do, but it doesn't use REFS. It has pretty good reviews too. It's a 'storage pool' package also, and I might play with it one day. But when ti comes right
down to it, I want MSFT to make it happen. I have 4 requests.
1. Let us store our local OneDrive partition/folder on REFS.
2. Put in a normal and reliable way to let us mount VHD on boot without scheduled tasks and scripts.
3. Make REFS work on the OS!
3. Let us put the boot volume on a Storage Space.

2 Way mirror via Storage Spaces using 2xJBODS

Looking to setup 2xJBODS connected to a cluster File Servers & use 2-WAY mirror for the pool. Its clear that w. a 2way mirror that it can only handle 2 drives failing before seeing data loss but is that 2 drives between both JBODS or is that 2 driver
per JBOD? Also I know that if 1 JBOD were to completely go offline that I would need a total of 3 JBODS in order for vms,etc to not be affected but what is the expected behavior. A jbod goes offline and we lose vms but data is not loss? Once the jbod
comes back data will be back to normal?

if you are going to mirror the 2 of them yes
What are the resiliency levels provided by Enclosure Awareness?
Storage Space Configuration
All Configurations are enclosure aware
Enclosure or JBOD Count / Failure Coverage
Two JBOD
Three JBOD
Four JBOD
2-way Mirror
1 Disk
1 Enclosure
1 Enclosure
3-way Mirror
2 disk
1 Enclosure + 1 Disk
1 Enclosure + 1 Disk
Dual Parity
2 disk
2 disk
1 Enclosure + 1 Disk
REF: Storage Spaces Frequently Asked Questions (FAQ)
Storage Spaces, JBODs, and Failover Clustering – A Recipe for Cost-Effective,
Highly Available Storage
This post is provided AS IS with no warranties or guarantees, and confers no rights.
~~~
Questo post non fornisce garanzie e non conferisce diritti

Clustered Storage Spaces - 3 disk minimum for 2-way mirror?

Why will a 2 disk, 1 column, 2-way mirrored space work fine outside of a cluster? Yet, when I want to use clustered storage spaces I need a minimum of 3 physical disks for a 2-way mirrored space? Killing me...
I mean if I add 2 additional disks and do a 4 disk, 2 column, 2-way mirrored space it's ok. What would be the purpose of using 3 disks as a minimum?
Thanks,
Scott

Hi,
Could you please give us more detailed explanation to help us understand your question?
“Cluster storage space” did you mean “Cluster Share Volume” for Hyper-V Cluster?
What did you mean “mirrored space”, did you mean software mirrored volume? For a cluster, we recommend you use a shared storage and configure disk fault tolerance with hardware RAID.
Give us more information of your questions for further troubleshooting.
For more information please refer to following MS articles:
Mirrored Volumes
http://technet.microsoft.com/en-us/library/cc938487.aspx
How to Configure a Clustered Storage Space in Windows Server 2012
http://blogs.msdn.com/b/clustering/archive/2012/06/02/10314262.aspx
Understanding Requirements for Failover Clusters
http://technet.microsoft.com/en-us/library/cc771404.aspx
Hope this helps!
TechNet Subscriber Support
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Storage Spaces, Columns and different Disk sizes

Let's assume the szenario of a 8-disk Storage Pool:
6x 4 TB HDD
2x 1 TB HDD
Now, a virtual Disk is created that uses a Mirrored-Layout and 4 Columns.
What will happen, once the written amount of data equals 1 TB per Disk?
Since the Drive is configured as double mirror with 4 Columns, will it:
- Stop accepting any data, since there is no 4th column available (The 1TB Disks are full)?
- Continue accepting data, but create a "pseudo-4-Column-Layout", where the actual 4th column is on the same disk as column 1,2 or 3?
- Switch to a 3 Column layout in order to utilize the remaining diskspace on disk 1-6? (If so, can the column count be restored later on, when adding more disks?)
- ...explode?
- Anyting else?
best,
dognose

Hi,
Columns correlate to underlying physical disks across which one stripe of data for a storage space is written. Since the virtual disk uses a Mirrored-Layout and 4 Columns, it will only get space equal to the size of 4*smallest drive=4*1=4TB, which will leave
portions of the larger drives unused. If the written amount of data equals 1 TB per Disk, you will add 2*4=8 disks to expand the virtual disk.
For more detailed information about NumberOfColumns, you could refer to the artice below:
Storage Spaces Frequently Asked Questions (FAQ)
http://social.technet.microsoft.com/wiki/contents/articles/11382.storage-spaces-frequently-asked-questions-faq.aspx#What_are_columns_and_how_does_Storage_Spaces_decide_how_many_to_use
Best Regards,
Mandy
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How storage spaces mirror onto multiple storage pool drives...

Tricky question to pose..
I currently have 2 * 2TB drives in a storage pool. I have a 2 TB storage space assigned to this pool (lets call them A and B). I have 2TB of mirrored storage across 4TB of drives. All is well...
If I add a third 2TB drive "C" to the storage pool, how will 2-way mirroring work now? My hope is that it will evenly mirror across each drive in the pool ( 1TB mirrored across A + B, 1TB across A+ C and 1TB across B + C) giving me effectively
3TB of mirrored storage.
If it does work as I hope, does the server rebalance the mirroring? Say I have already used 1.8GB of storage by the time I add in the 3rd drive, there is only 0.2GB on each of the morrored drives available. When I add in the 3rd drive, if the
server does not re-allocate, then I would only gain 0.4GB of storage (0.2GB A+C, 0.2GB B+C) leaving 1.4GB unusable.
If not as I hoped, how do I make use of the 3rd drive? I assume the 3rd drive is useless in that pool unless I do 3-way mirroring or I add another 4th drive?
Thanks, Mark.

Tricky question to pose..
I currently have 2 * 2TB drives in a storage pool. I have a 2 TB storage space assigned to this pool (lets call them A and B). I have 2TB of mirrored storage across 4TB of drives. All is well...
If I add a third 2TB drive "C" to the storage pool, how will 2-way mirroring work now? My hope is that it will evenly mirror across each drive in the pool ( 1TB mirrored across A + B, 1TB across A+ C and 1TB across B + C) giving me effectively
3TB of mirrored storage.
If it does work as I hope, does the server rebalance the mirroring? Say I have already used 1.8GB of storage by the time I add in the 3rd drive, there is only 0.2GB on each of the morrored drives available. When I add in the 3rd drive, if the
server does not re-allocate, then I would only gain 0.4GB of storage (0.2GB A+C, 0.2GB B+C) leaving 1.4GB unusable.
If not as I hoped, how do I make use of the 3rd drive? I assume the 3rd drive is useless in that pool unless I do 3-way mirroring or I add another 4th drive?
Thanks, Mark.
A Storage Spaces mirror configuration stores 2 copies of each data block on 2 different physical drives. However, it does not balance the data. So in your specific example, adding a third drive to a mirror environment won't help much.
You would really need to add a fourth 2 TB drive at the same time.
You can get more info on Storage Spaces here.

Storage spaces simple mirror question

I just have a simple mirror at the moment, with just two 1tb drives in mirror mode, and it works just fine. Two things I do wonder. If one drive fails, I assume the files would be preserved on the other. I wonder however if it can be plugged
into another Windows box, a Windows 7 machine for example, and read by that machine, or if it can only be read by the machine on which it was setup?
I have assumed Storage Spaces was like hardware raid in this way, but now I wonder....

Hi,
For mirror mode, it means that Data is duplicated on two or three physical disks, and this storage layout requires at least two disks to protect you from a single disk failure.
But you can't view the content in the disk since Storage Spaces records information about pools and storage spaces on the physical disks that compose the storage pool. Therefore, your pool and storage spaces are preserved when you move an entire storage
pool and its physical disks from one computer to another.
Windows Server 2012 starts storage that could potentially be shared with a cluster in a safe state. For Storage Spaces, that means the first time Windows connects to a storage pool, the pool starts as read-only and the storage spaces will start in a detached
state. To access your data, you must set the storage pool to read-write and then attach the storage spaces.
These steps do not apply to Windows 8 – storage pools start as read-write and storage spaces start as attached.
Kate Li
TechNet Community Support

Cmdlets for a usable storage space

I have available 8 x 2TB HDDs and 4 x 400GB SSD's which I want to create a Tiered Storage based Storage Spaces volume with. I want to use 10GB of space for the Quorum volume later. I'm missing something, here's what I'm doing.
Here's my physical disks:
PS C:\Users\administrator> Get-PhysicalDisk
FriendlyName CanPool OperationalStatus HealthStatus Usage Size
PhysicalDisk3 True OK Healthy Auto-Select 372.61 GB
PhysicalDisk6 True OK Healthy Auto-Select 372.61 GB
PhysicalDisk1 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk4 True OK Healthy Auto-Select 372.61 GB
PhysicalDisk8 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk5 True OK Healthy Auto-Select 372.61 GB
PhysicalDisk12 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk2 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk9 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk11 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk10 True OK Healthy Auto-Select 1.82 TB
PhysicalDisk7 True OK Healthy Auto-Select 1.82 TB
I assign the available physical disks to the array variable $PhysicalDisks
$pooldisks = Get-PhysicalDisk | ? {$_.CanPool –eq $true }
Then I create a new storage pool using $pooldisks.
New-StoragePool -StorageSubSystemFriendlyName *Spaces* -FriendlyName TieredPool1 -PhysicalDisks $pooldisks
Then I assign them to SSD and HDD tiers:
$tier_hdd = New-StorageTier -StoragePoolFriendlyName TieredPool1 -FriendlyName HDD_TIER -MediaType HDD
$tier_ssd = New-StorageTier -StoragePoolFriendlyName TieredPool1 -FriendlyName SSD_TIER -MediaType SSD
And I get stuck trying to create the Virtual Disk:
New-VirtualDisk -FriendlyName VirtualDisk1 -StoragePoolFriendlyName TieredPool1 -NumberOfColumns 4 -OtherUsageDescription "8 x 2TB HDD and 4 x 400GB SSD" -ProvisioningType Fixed -ResiliencySettingName Mirror -StorageTiers $tier_ssd, $tier_hdd -StorageTierSizes 800GB, 8000GB -WriteCacheSize 5GB
The error message I receive is:
New-VirtualDisk : There are not enough eligible physical disks in the storage pool to create the specified virtual disk configuration.
At line:1 char:1
+ New-VirtualDisk -FriendlyName VirtualDisk1 -StoragePoolFriendlyName TieredPool1 ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (StorageWMI:ROOT/Microsoft/...SFT_StoragePool) [New-VirtualDisk], CimException
+ FullyQualifiedErrorId : StorageWMI 48004,New-VirtualDisk
The reason I am trying to do this manually and not via the GUI, is because I need to assign 4 columns to the Storage Space, and the GUI defaults to 2. Any help is appreciated.

Hi,
I would like to know the exact part which causes the error message, the number of column or the size of the virtual disk.
So please help try the following 2 commands and see if any one of them could be performed:
New-VirtualDisk -FriendlyName VirtualDisk1 -StoragePoolFriendlyName TieredPool1
-NumberOfColumns 2 -OtherUsageDescription "8 x 2TB HDD and 4 x 400GB SSD" -ProvisioningType Fixed -ResiliencySettingName Mirror -StorageTiers $tier_ssd, $tier_hdd -StorageTierSizes 800GB, 8000GB -WriteCacheSize 5GB
and
New-VirtualDisk -FriendlyName VirtualDisk1 -StoragePoolFriendlyName TieredPool1 -NumberOfColumns 4 -OtherUsageDescription "8 x 2TB HDD and 4 x 400GB SSD" -ProvisioningType Fixed -ResiliencySettingName Mirror -StorageTiers $tier_ssd, $tier_hdd -StorageTierSizes
400GB, 4000GB -WriteCacheSize 5GB
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Columns in a 2way Mirror Storage Space

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