Oracle VM 2.2: why virtual disk must be 1GB or larger?

I'm using Oracle VM 2.2. When I try to create a virtual disk using OVM Manager it requires that the disk be at least 1GB in size. Is there a reason for this? Or is it an arbitrary limit enforced by OVM Manager?

OK, but it seems like this arbitrary limit provides no benefit. In my case I actually do want a small disk image. I want to use it to pass small amounts of configuration information to a VM at startup, but it seems like this won't be possible via OVM interfaces (I can't create a small private disk image, I can't import an existing disk image, etc). So it looks like I'll have to go under the covers and manipulate the VM image directly.
Am I missing anything? Does OVM Manager provide any interfaces for passing configuration information to a VM at startup?

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Errors related to third-party security software
Error 2, 4 (or -4), 6, 40, 1000, 9006
Follow Troubleshooting security software. Often, uninstalling third-party security software will resolve these errors.
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Verify that communication to albert.apple.com or photos.apple.com is not blocked by a firewall, or other Internet security setting.
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Restore your device while connected to a different network.
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Can not import Share virtual disk

I'm using ocfs2 filesystem
to creating a virtual shared disk oracle VM Manager -> Resources -> Shared Virtual Disks
Server Pool name: mypool
Group Name:
Virtual Disk Name: sharedisk
Virtual Disk Size: 5000
Description:
Can not selected Share virtual disk files which is null when import.what is error?
thank

Hi,
please clarify your error a little bit more.
a.) Did the create work correctly? Or did you get an error? If yes what error?
b.) Did you have problems attaching the Shared Disk to the VM?
Sebastian

Shared Virtual Disk

When creating a virtual shared disk oracle VM Manager -> Resources -> Shared Virtual Disks the only option you have are
Virtual Disk Name:
Virtual Disk Size:
Server Pool name:
Group Name:
Description:
My question is how do you know what this virtual disk is mapped to? i.e. SAN, NFS, LOCAL DISK?
Also how do you specific what disk to use ideally I would like the virtual disk to use a 150GB LUN from my SAN?

With the exception of multipath devices (and plain files obviously), there is no user interface for other kinds of devices for back end storage for DomUs, but Xen supports them. You have to edit the config yourself. They are in /OVS/running_pool/<name>/vm.cfg
Look for the disk = line and edit it to something like this:
disk = [
'phy:/dev/DomUDisk2/LVOracleApp,xvda,w',
In this case, I used a local LVM logical volume as back end storage (/dev/DumUDisk2) and I mapped it to the paravirtual device in the vm (xvda). You have to do something similar. I don't have a SAN/HBAs, but assuming your LUN shows up on Dom0 as /dev/sda, you might give a try to something like:
disk = ['file:/OVS/running_pool/myvm/System.img,hda,w', # or whater you want to do for the boot/root disk
*'phy:/dev/sda,xvda,w',* ]
Once this works, you might want to configure multipath if your hardware supports it.
Best of luck, keep us posted.

Why oracle.exe is taking 8G virtual; bytes, memroy target can not go beyond 5G. How to minimized the virtual byte in perfmon

Dear Experts,
Please help me in checking why virtual bytes in perfmon is taking more than memory we allocated.
OS
Windows Server 2003 R2 Enterprise x64 Edition Service Pack 2 (build 3790)
ORACLE
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - 64bit Production
PL/SQL Release 11.1.0.6.0 - Production
CORE    11.1.0.6.0      Production
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production
NLSRTL Version 11.1.0.6.0 - Production
Total RAM on box is 8G
Page File
Windows virtual memory equal on C,D,E,F drives is set to 12273M and allocated now is 11262M
LPENABLED is not set
SQL> show parameter pga_
pga_aggregate_target   0
SQL> show sga
Total System Global Area 5344731136 bytes
Fixed Size                  2114736 bytes
Variable Size            4630514512 bytes
Database Buffers          671088640 bytes
Redo Buffers               41013248 bytes
SQL> show parameter memory
hi_shared_memory_address 0
memory_max_target    5G
memory_target      5G
shared_memory_address 0
SQL> show parameter sga
lock_sga   FALSE
pre_page_sga     FALSE
sga_max_size   5G
sga_target      0
Question :
Why oracle.exe is taking 8G virtual; bytes, memroy target can not go beyond 5G. How to minimized the virtual byte in perfmon
Thanks in advance your time and help.

John, Thanks for the reply.
Please find the output of query
SQL> select pool,sum(bytes) from v$sgastat group by pool;
POOL         SUM(BYTES)
              915543216
java pool      67108864
streams pool 268503944
shared pool 2147494008
large pool     67108864
SQL>
SQL> select * from v$pgastat;
NAME                                                                  VALUE UNIT
aggregate PGA target parameter                                    671088640 bytes
aggregate PGA auto target                                         147564544 bytes
global memory bound                                               104857600 bytes
total PGA inuse                                                   533962752 bytes
total PGA allocated                                               810819584 bytes
maximum PGA allocated                                            1244466176 bytes
total freeable PGA memory                                          90243072 bytes
process count                                                           450
max processes count                                                     588
PGA memory freed back to OS                                      1.9883E+10 bytes
total PGA used for auto workareas                                  28210176 bytes
maximum PGA used for auto workareas                                39973888 bytes
total PGA used for manual workareas                                       0 bytes
maximum PGA used for manual workareas                                531456 bytes
over allocation count                                                     7
bytes processed                                                  2.6307E+10 bytes
extra bytes read/written                                                  0 bytes
cache hit percentage                                                    100 percent
recompute count (total)                                               72720
19 rows selected.
SQL>
SQL> show parameter _target
NAME                                 TYPE                             VALUE
archive_lag_target                   integer                          0
db_flashback_retention_target        integer                          1440
fast_start_io_target                 integer                          0
fast_start_mttr_target               integer                          0
memory_max_target                    big integer                      5G
memory_target                        big integer                      5G
pga_aggregate_target                 big integer                      0
sga_target                           big integer                      0
SQL> sho parameter sga_max
NAME                                 TYPE                             VALUE
sga_max_size                         big integer                      5G

Oracle VM Migrating virtual disk images to physical disks (block devices)

Hi,
For performance reasons, I'd like to migrate my .img file based virtual disks into physical partitions for VM's.
What is the safest possible way to migrate all partitions (including / partition) from a virtual disk to a block device?
Thanks,
Onur

hobeygo wrote:
What is the safest possible way to migrate all partitions (including / partition) from a virtual disk to a block device?Create block devices the same size as your .img files and then use dd to copy the contents of the .img file to the block device. Your VMs need to be offline while you do this. Once you've done this, you can use Oracle VM Manager to remove the original .img file and replace it with the physical block device copy. This is low-risk, as the .img file will still be there if the new block device doesn't work.
Keep in mind that you will need a unique block device for every .img file you have.

Oracle VM 3.1.1: Cloning virtual disks between local filesystems

Hi all,
Is it possible to clone virtual disk between two repositories where each repository is based on own local filesystem?
I receive an error when trying to do such clone in OVM Manager:
OVMAPI_7262E Unable to find an owned and running server to perform copy_file operation on +diskname+thanks in advance,
Miroslaw

You can clone disks between repositories, if both repositories are presented to at least one server at the same time.

Shared virtual disks and linux installation

Dear all,
when i add some shared virtual disk to the virtual machine and start the instsallation of oracle linux i face a major performance issue and the system takes a long time to boot and linux cd's and start the instsallation process, i don't know why this issue is happening to me but it is giving me alot of troubes. i had to buy a new machine with husge configuration to try oracle VM and i feel like i bought for no benifits at all
your help will be appreciated/

Avi,
Actually, if you have one server HA would do nothing for you. You need at least two servers for HA to be useful.
Also I would believe that since you only have one 500 gig drive I am sure it is a sata drive that you are using. That drive is running your Dom0 plus all other DomU's. The shared drive is a file on the filesystem under the /OVS directory your DomU system drive is a file on the /OVS filesystem. While your experience is still a little odd it would run but be really slow. You say that without the shared drive it runs OK so my first thought would be to drop the shared disk and recreate it since it sounds like you have nothing on it at this point in time anyway.
Could be that the file for the shared disk became corrupt with something else you had done.

There is no more space for virtual disk ServerName_2.vmdk. You might be able to continue this session by freeing disk space on the relevant volume, and clicking Retry. Click Cancel to terminate this session.   Time: 30/05/2014 1:16:20 AM

Recently, our mail server crashed at about 7pm one night, with the error 'There is no more space for virtual disk ServerName_2.vmdk. You might be able to continue this session by freeing disk space on the relevant volume, and clicking Retry. Click Cancel to terminate this session.'
When we click Retry, the server starts up OK.
There are no snapshots listed in Snapshot manager for any of the virtual machines on the host.
There is also free disk space available on the host and for the VM with the disk errors.
This happened at least three more times, often at bad times. Each time, we were able to click 'Retry' and the disk/system would allow the VM to start-up successfully.
I checked the Forums, the VMware support articles and the internet as I had not seen this problem before. I have completed the VSphere 5.1 - Fast Track course and this issue was NOT covered in the training.
Most of the advice on-line and even that on the VMware web-site was pointing to snapshots being the cause of this issue. There are no snapshots enabled and I cannot see evidence of snapshots ever being used.
- We are running VMware vsphere (5.1.0) and there are (were) 4 virtual machines running on the ESX host. We are using the free version of VMware/ESXi.
- The Hard disk types we are using for this Virtual Machine are 'Thin Provisioned'.
- There are 4 [Thin Provisioned] Hard Disks for this virtual machine.
- There are 6 CPUs
- There is 20GB of RAM (memory)
- The VM is running Windows Server 2008 R2 as the guest/VM operating system. It is an Exchange 2010 SP1 mail server. There is plenty of available disk space on all the drives. The [Exchange] log files are cleaned out regularly (automated).
I decided to move one of our non-critical servers off this host and on to another host to see if this helped the problem. This took quite some time, as we are not using HA or vmotion, nor do we have VCenter Server...nonetheless, I finally managed to get the non-critical server on to another host (n.b. This was a much smaller machine with less virtual resources assigned to it).
After moving the non-critical server off this host, we decided to monitor the Host and see if the issue resolved itself.
I checked the host about 6-10 times a day, from first thing in the morning till last thing at night - monitoring the performance of not only the Virtual Machine, but the ESXi host also.
There were no adverse performance issues. The only thing I did note, was in the Summary page on the ESX Host, under Storage, was If I right-clicked on the datastore and clicked refresh, then the free disk space would drop (ie from 140GB to 125GB).
After monitoring the host and VM for about 2 weeks, we did NOT have another instance of the above error.
Sorry for the long winded post, but I wanted to give as much detail given this error has been raised before and snapshots are usually blamed as the cause.
My question is this:
If the ESX host had plenty of available disk capacity and there were no snapshots enabled on the VM (or any other VM's on the same host), then why did our Virtual machine crash with the error that 'there is not more space for virtual disk Servername_2.vmdk'?
How do we prevent this issue from happening if we don't know the underlying cause?
I would greatly appreciate any advice or suggestions.
If I have not provided enough info on the specs or environment, please let me know and I will provide more information.
Thanks all,
Kurt

The type of storage is really based on your requirements, and your ability to withstand downtime.
iSCSI as you are using with a NAS such as Synology or QNAP. NAS Selector - Support - Synology - Network Attached Storage (NAS)
I wouldn't use iSCSI for Exchange or any database. It's a bit slow.
Do you have a single physical host? Then I'd probably to an external direct attached storage. This would be a card inserted in your host server that gives you multilane SAS/SATA connectivity (www.techcable.com/SAS-SATA/SAS-SATA.pps) and an external disk enclosure/array.
For multiple hosts to a single array, I recommend a fibre channel connection to a FC capable switch, and on to a FC connected array.
We used to use a HP P2000 (on old G1), but it's since been retired. Worked pretty well once firmware was upgraded. http://www8.hp.com/us/en/products/disk-storage/product-detail.html?oid=4118559#!tab=features. They can be connected via iSCSI, Fibre Channel or 6GB SAS so they are flexible and reasonably priced.
Recommendations:
     Use RAID 6 with your large disk arrays. With large disks there is a measurable failure rate when rebuilding a failed RAID5 array based on MTBF.
     Use smaller 15K disks in RAID 0+1 for speed on databases/Exchange.
     Use slower 7.2K disks in RAID6 for file storage.
We are a small hospital and we have 3 VMware servers with dual CNA (FC and Ethernet in a single twinax cable) connections to 2 redundant Cisco Nexus 5K switches and then 4 Fibre Channel connections to an EMC VNX 5300. It's extremely fast with about 50 virtual servers, but was quite an investment. One thing we don't have to worry about is down time. If there ever is an equipment failure, we have redundant everything, including power split between two UPSs.
Our VNX has 3 tiers of performance. 3 100GB SSD "Fast Cache" in RAID 1 with hot spare, to keep the most used data ready, but it's not really a tier, however one could be built utilizing the same disks. A second tier is performance tier with a 8 600GB RAID 0+1 and hot spare. The third is a bunch of 7.2K 3TB disks in RAID6. The VNX autotiers, placing data on disks depending on where it's needed. The volumes are sliced and diced automatically in the background to make this happen and we never have to touch it. I used a demo of Solarwinds Storage Manager to monitor performance for a while and the utilization was always low, meaning all data access was fast, througout the day.
D

Unable to repair degraded Virtual disks in Storage Spaces under Hyper-V 2012 R2 Core

Hi all,
I am finding myself in the following conundrum. I have a storage pool under Hyper-V Core, with 2 2TB Seagate drives.
One of the drives completely died (wouldn't spin up, tried it in a different box, still to no avail). I sent it in to Seagate for warranty replacement, got the new drive. Installed it and went through the notions of adding it to the pool and retiring the
one that was with "Lost Communication" status.
Tried to repair the virtual disks that are showing as "Unhealthy-Detached", quickly get 100% complete, but the repair didnt work.
The storage pool is in degraded state.
Looks like metadata is corrupted.
Followed this post to upgrade Storage Spaces to latest version:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/eead59e9-5e49-4bb6-8cbb-1dafddd9576b/unable-to-repair-degraded-virtual-disks-in-storage-spaces-2012r2?forum=winserverfiles
Still, to no avail.
Couple of questions:
1) Is the data on the 3 virtual disks in state "Unhealthy: Detached" not recoverable?
2) How can I get the storage pool back to "healthy"?
Any help will be greatly appreciated.
PS C:\corefig> Get-PhysicalDisk | ? OperationalStatus -ne OK | fl
ObjectId : {1}\\HV001\root/Microsoft/Windows/Storage/Pr
oviders_v2\SPACES_PhysicalDisk.ObjectId="{95
42513c-a0d4-11e3-8123-806e6f6e6963}:PD:{7e22
245f-0cf6-11e3-b1db-806e6f6e6963}"
PassThroughClass :
PassThroughIds :
PassThroughNamespace :
PassThroughServer :
UniqueId :
AllocatedSize : 1218696970240
BusType : Unknown
CannotPoolReason : In a Pool
CanPool : False
Description :
DeviceId :
EnclosureNumber :
FirmwareVersion :
FriendlyName : PhysicalDisk-1
HealthStatus : Warning
IsIndicationEnabled :
IsPartial : False
LogicalSectorSize : 0
Manufacturer :
MediaType : UnSpecified
Model :
OperationalStatus : Lost Communication
OtherCannotPoolReasonDescription :
PartNumber :
PhysicalLocation :
PhysicalSectorSize : 0
SerialNumber :
Size : 1999575711744
SlotNumber :
SoftwareVersion :
SpindleSpeed : 0
SupportedUsages : {Auto-Select, Manual-Select, Hot Spare,
Retired...}
Usage : Retired
PSComputerName :
PS C:\corefig> get-physicaldisk
FriendlyName CanPool OperationalS HealthStatus Usage Size
tatus
PhysicalDisk4 False OK Healthy Auto-Select 73.75 GB
PhysicalDisk0 False OK Healthy Auto-Select 1.82 TB
PhysicalDi... False Lost Comm... Warning Retired 1.82 TB
PhysicalDisk2 False OK Healthy Auto-Select 930.75 GB
PhysicalDisk3 False OK Healthy Auto-Select 74.53 GB
PhysicalDisk1 False OK Healthy Auto-Select 1.82 TB
PS C:\corefig> get-virtualdisk -friendlyname 'Data' |FC
class CimInstance#ROOT/Microsoft/Windows/Storage/MSFT_VirtualDisk
ObjectId = {1}\\HV001\root/Microsoft/Windows/Storage/Providers_v2\SPACES_Virt
ualDisk.ObjectId="{9542513c-a0d4-11e3-8123-806e6f6e6963}:VD:{3debf056-01f1-11
e3-b1d6-001fbc081884}{7e2229cf-0cf6-11e3-b1db-001fbc081884}"
PassThroughClass =
PassThroughIds =
PassThroughNamespace =
PassThroughServer =
UniqueId = CF29227EF60CE311B1DB001FBC081884
Access = Read/Write
AllocatedSize = 548413636608
DetachedReason = Incomplete
FootprintOnPool = 1096827273216
FriendlyName = Data
HealthStatus = Unhealthy
Interleave = 262144
IsDeduplicationEnabled = False
IsEnclosureAware = False
IsManualAttach = False
IsSnapshot = False
LogicalSectorSize = 512
Name =
NameFormat =
NumberOfAvailableCopies =
NumberOfColumns = 1
NumberOfDataCopies = 2
OperationalStatus = Detached
OtherOperationalStatusDescription =
OtherUsageDescription =
ParityLayout = Unknown
PhysicalDiskRedundancy = 1
PhysicalSectorSize = 4096
ProvisioningType = Thin
RequestNoSinglePointOfFailure = False
ResiliencySettingName = Mirror
Size = 1099511627776
UniqueIdFormat = Vendor Specific
UniqueIdFormatDescription =
Usage = Other
WriteCacheSize = 0
PSComputerName =
PS C:\corefig> get-virtualdisk -friendlyname 'Backups' |FC
class CimInstance#ROOT/Microsoft/Windows/Storage/MSFT_VirtualDisk
ObjectId = {1}\\HV001\root/Microsoft/Windows/Storage/Providers_v2\SPACES_Virt
ualDisk.ObjectId="{9542513c-a0d4-11e3-8123-806e6f6e6963}:VD:{3debf056-01f1-11
e3-b1d6-001fbc081884}{7e22255e-0cf6-11e3-b1db-001fbc081884}"
PassThroughClass =
PassThroughIds =
PassThroughNamespace =
PassThroughServer =
UniqueId = 5E25227EF60CE311B1DB001FBC081884
Access = Read/Write
AllocatedSize = 743566213120
DetachedReason = Incomplete
FootprintOnPool = 1487132426240
FriendlyName = Backups
HealthStatus = Unhealthy
Interleave = 262144
IsDeduplicationEnabled = False
IsEnclosureAware = False
IsManualAttach = False
IsSnapshot = False
LogicalSectorSize = 512
Name =
NameFormat =
NumberOfAvailableCopies =
NumberOfColumns = 1
NumberOfDataCopies = 2
OperationalStatus = Detached
OtherOperationalStatusDescription =
OtherUsageDescription =
ParityLayout = Unknown
PhysicalDiskRedundancy = 1
PhysicalSectorSize = 4096
ProvisioningType = Thin
RequestNoSinglePointOfFailure = False
ResiliencySettingName = Mirror
Size = 1649267441664
UniqueIdFormat = Vendor Specific
UniqueIdFormatDescription =
Usage = Other
WriteCacheSize = 0
PSComputerName =
PS C:\corefig> get-virtualdisk -friendlyname 'Music' |FC
class CimInstance#ROOT/Microsoft/Windows/Storage/MSFT_VirtualDisk
ObjectId = {1}\\HV001\root/Microsoft/Windows/Storage/Providers_v2\SPACES_Virt
ualDisk.ObjectId="{9542513c-a0d4-11e3-8123-806e6f6e6963}:VD:{3debf056-01f1-11
e3-b1d6-001fbc081884}{7e2238b9-0cf6-11e3-b1db-001fbc081884}"
PassThroughClass =
PassThroughIds =
PassThroughNamespace =
PassThroughServer =
UniqueId = B938227EF60CE311B1DB001FBC081884
Access = Read/Write
AllocatedSize = 39728447488
DetachedReason = By Policy
FootprintOnPool = 79456894976
FriendlyName = Music
HealthStatus = Unknown
Interleave = 262144
IsDeduplicationEnabled = False
IsEnclosureAware = False
IsManualAttach = True
IsSnapshot = False
LogicalSectorSize = 512
Name =
NameFormat =
NumberOfAvailableCopies =
NumberOfColumns = 1
NumberOfDataCopies = 2
OperationalStatus = Detached
OtherOperationalStatusDescription =
OtherUsageDescription =
ParityLayout = Unknown
PhysicalDiskRedundancy = 1
PhysicalSectorSize = 4096
ProvisioningType = Thin
RequestNoSinglePointOfFailure = False
ResiliencySettingName = Mirror
Size = 161061273600
UniqueIdFormat = Vendor Specific
UniqueIdFormatDescription =
Usage = Other
WriteCacheSize = 0
PSComputerName =
PS C:\corefig> get-virtualdisk -friendlyname 'Videos' |FC
class CimInstance#ROOT/Microsoft/Windows/Storage/MSFT_VirtualDisk
ObjectId = {1}\\HV001\root/Microsoft/Windows/Storage/Providers_v2\SPACES_Virt
ualDisk.ObjectId="{9542513c-a0d4-11e3-8123-806e6f6e6963}:VD:{3debf056-01f1-11
e3-b1d6-001fbc081884}{7e2225bc-0cf6-11e3-b1db-001fbc081884}"
PassThroughClass =
PassThroughIds =
PassThroughNamespace =
PassThroughServer =
UniqueId = BC25227EF60CE311B1DB001FBC081884
Access = Read/Write
AllocatedSize = 223606734848
DetachedReason = Incomplete
FootprintOnPool = 447213469696
FriendlyName = Videos
HealthStatus = Unhealthy
Interleave = 262144
IsDeduplicationEnabled = False
IsEnclosureAware = False
IsManualAttach = False
IsSnapshot = False
LogicalSectorSize = 512
Name =
NameFormat =
NumberOfAvailableCopies =
NumberOfColumns = 1
NumberOfDataCopies = 2
OperationalStatus = Detached
OtherOperationalStatusDescription =
OtherUsageDescription =
ParityLayout = Unknown
PhysicalDiskRedundancy = 1
PhysicalSectorSize = 4096
ProvisioningType = Thin
RequestNoSinglePointOfFailure = False
ResiliencySettingName = Mirror
Size = 1759325978624
UniqueIdFormat = Vendor Specific
UniqueIdFormatDescription =
Usage = Other
WriteCacheSize = 0
PSComputerName =

Hi omon_77,
You can first refer the following step by step third party article and KB:
Replace Failed Disks and Repair JBODs for Storage Spaces in Windows Server
https://technet.microsoft.com/en-us/library/dn782852.aspx?f=255&MSPPError=-2147217396
Replacing a failed disk in Windows Server 2012 Storage Spaces with PowerShell
https://www.hodgkins.net.au/storage/replace-failed-disk-in-storage-spaces-pool-with-powershell/
Step By Step: How to Replace Faulty Disk In Two-Way Mirrored Storage Tiered Space
http://charbelnemnom.com/2014/09/step-by-step-how-to-replace-faulty-disk-in-two-way-mirrored-storage-tiered-space-storagespaces-ws2012r2/
More information:
Storage Spaces - Designing for Performance
http://social.technet.microsoft.com/wiki/contents/articles/15200.storage-spaces-designing-for-performance.aspx
Storage Spaces Overview
http://technet.microsoft.com/en-us/library/hh831739.aspx
Windows Server Storage Spaces: What is it and why should I use it?
http://curah.microsoft.com/5049/windows-server-2012-r2-storage-spaces-what-is-it-and-why-should-i-use-it
I’m glad to be of help to you!
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

Storage Spaces: Virtual Disk taken offline during file copy, marked as "This disk is offline because it is out of capacity", but plenty of free space

Server 2012 RC. I'm using Storage Spaces, with two virtual disks across 23 underlying physical disks.
* First virtual disk is fixed provisioning, parity across 23 physical disks: 10,024GB capacity
* Second virtual disk is fixed provisioning, parity across the remaining space on 6 of the same physical disks: 652GB capacity
These have been configured as dynamic disks, with an NTFS volume spanned across the two (larger virtual disk first). Total volume size 10,676GB. For more details of the hardware, and why the configuration is like this, see: http://social.technet.microsoft.com/Forums/en-US/winserver8gen/thread/c35ff156-01a8-456a-9190-04c7bcfc048e
I'm copying several TB from a network share to this volume. It is very slow at ~12MB/sec, but works. However, three times so far, several hours in to the file copy and with plenty of free space remaining, the 10,024GB virtual disk is suddenly taken offline.
This obviously then fails the spanned volume and stops the file copy.
The second time, I took screenshots, below. The disk (Disk27) is marked offline due to "This disk is offline because it is out of capacity". And the disk in the spanned volume is marked as missing (which is what you would expect when one of its member disks
is offline).
I can then mark the disk (Disk27) back online again, and this restores the spanned volume. I can then re-start the file copy from where it failed. There doesn't appear to be any data loss, but it does cause an outage that requires manual attention. As you
can see, there is plenty of space left on the spanned volume.
Each time this has happened, there are a few event 150 errors in the System event log: "Disk 27 has reached a logical block provisioning permanent resource exhaustion condition.". Source: Disk.
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="disk" />
<EventID Qualifiers="49156">150</EventID>
<Level>2</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2012-06-07T11:24:53.572101500Z" />
<EventRecordID>14476</EventRecordID>
<Channel>System</Channel>
<Computer>Trounce-Server2.trounce.corp</Computer>
<Security />
</System>
- <EventData>
<Data>\Device\Harddisk27\DR27</Data>
<Data>27</Data>
<Binary>000000000200300000000000960004C0000000000000000000000000000000000000000000000000</Binary>
</EventData>
</Event>
This error seems to be related to thin provisioning of disks. I found this:
http://msdn.microsoft.com/en-us/library/windows/desktop/hh848068(v=vs.85).aspx. But both these Virtual Disks are configured as Fixed, not Thin provisioning, so it shouldn't apply.
My thoughts: the virtual disk should not spuriously go offline during a file copy, even if it was out of space. And in any case, there is plenty of free space remaining. Also, I don't understand the reason for why it is marked as offline ("This disk is offline
because it is out of capacity"). Why would a disk go offline because it was out of thin capacity, rather than just returning an "out of disk space" error while keeping it online.

Interesting Thread, I've been having the same issue. I had a failed hardware RAID that was impossible to recover in place, so after being forced to do a 1:1 backup, I find myself with 5 2TB hard drives to play with. Storage Spaces seemed like an interesting
way to go until I started facing the issues we share.
So my configuration is A VM Running Windows Server 2012 RC with 5 Virtualized Physical drives using a SCSI interface, 2TB in size that make up my storage pool. A Single Thinly provisioned Disk of 18 TB (using 1 disk for parity)
Interestly enough, write speed has not been an issue on this machine (30~70MB/s, up from 256k on the beta)
Of note to me is this error in my event log 13 minutes before the drive disappeared:
"The shadow copies of volume E: were deleted because the shadow copy storage could not grow in time.Consider reducing the IO load on the system or choose a shadow copy storage volume that is not being shadow copied."Source: volsnap, Event ID: 25, Level: Error
followed by:
"The system failed to flush data to the transaction log. Corruption may occur in VolumeId: E:, DeviceName: \Device\HarddiskVolume17.(The physical resources of this disk have been exhausted.)"Source: Ntfs (Microsoft-Windows-Ntfs), Event ID: 140, Level: Warning
I figure the amount of space available to me before I start encountering physical limits is in the vicinity of about 7TB. It dropped out for the second time at 184 GB.
FYI, the number of columns created for me is 5
Regards,
Steven Blom

Cannot see more than one shared virtual disk at a time

I have multiple virtual disks configured and as I add them to the specific virtual machine im using it modifies the vm.cfg as follows:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,hdd,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,hde,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,hdf,w!',
when the machine boots up the contents of /dev only contains the shared drive hdd, thus I cannot see hde or hdf.
One thing I tried was to edit the vm.cfg after adding the shared drives to the machine to mimic:
disk = ['file:/OVS/running_pool/110_openfiler/System.img,hda,w',
',hdc:cdrom,r',
'file:/OVS/sharedDisk/openfiler-ocs-u01.img,sda,w!',
'file:/OVS/sharedDisk/openfiler-ocs-u02.img,sdb,w!',
'file:/OVS/sharedDisk/openfiler-SAN-test.img,sdc,w!',
This allows me to see all three drives when I issue fdisk -l
Disk /dev/hda: 105.2 GB, 105226698752 bytes
255 heads, 63 sectors/track, 12793 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 14 12539 100615095 83 Linux
/dev/hda3 12540 12793 2040255 82 Linux swap / Solaris
Disk /dev/sda: 20.9 GB, 20971520512 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 2550 20480000 ee EFI GPT
Disk /dev/sdb: 20.9 GB, 20972569088 bytes
255 heads, 63 sectors/track, 2549 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdb1 1 2550 20481024 ee EFI GPT
Disk /dev/sdc: 104.8 GB, 104857600512 bytes
255 heads, 63 sectors/track, 12748 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sdc1 1 12749 102400000 ee EFI GPT
but then my question becomes... could this cause any potential problems?

I found that there are 4 IDE disks and 7 SCSI disks at most for HVM guest on Oracle VM 2.1 version. For IDE disks, The available disknames are from hda to hdd; and for SCSI disks, are from sda to sdg. you may make test about it. :)
Message was edited by:
Changhai

Want to convert existing Parallels virtual disk to Boot Camp

I have an existing Parallels VM running on a virtual disk. I'd like to transfer that to a Boot Camp partition. Can this be done?
Most of the discussion here and elsewhere is about the reverse - importing a Boot Camp setup into Parallels, and/or setting up a new virtual machine using the Boot Camp partition. That's NOT what I want to do, though it may be what I end up doing, I guess.

I was only saying that whatever VMware and Parallels do to have one license for VM AND for Boot Camp "stretches" the EULA a bit.
+Please make sure that you do not violate the licensing agreement of your operating system and other installed software by virtualizing your system.+
People with Mac Pro definitely are running multiple VMs today.
As for if/how to convert:
http://www.paragon-software.com/home/go-virtual/
easily migrates a Windows-based computer to a virtual environment (P2V) and vice versa (V2P)
http://www.paragon-software.com/home/vm-professional/features.html
Supported Virtual Machines
Microsoft Virtual PC
VMware™ Workstation
VMware™ Fusion
Oracle VirtualBox 3
http://www.paragon-software.com/home/vm-professional/
I don't see Macs and Parallels being supported.
Windows 7 Virtual Hard Drives are also interesting and have some nice features. Like boot to a VHD.
http://edge.technet.com/Media/Dual-Boot-from-VHD-with-Windows-7-and-Windows-Seve r-2008-R2/
http://blogs.technet.com/aviraj/archive/2009/01/17/windows-7-boot-from-vhd-first -impression-part-1.aspx

Server 2012 R2 iSCSI Target - Multiple targets per iSCSI Virtual Disk with CHAP

Scenario I am trying to achieve is this:
Windows Server 2012 R2 serves as iSCSI Target configured to have 1 iSCSI Virtual Disk
2 Hyper-V servers connecting to this target with iSCSI Inistator and have multiple targets for that iSCSI Virtual Disk using CHAP
**These 2 are nodes in fail over cluster, this iSCSI is added as a CSV.
Issue that I have, is that you can only have 1 target per iSCSI Virtual Disk
Both Hyper-V servers can connect to this LUN without issue when I add both initiator IDs to the target, but once I enable CHAP, you can only put one initiator ID in the "Name" field, so I can only connect from 1 Hyper-V server.
Do you know of a way around this?

From my understanding, "chaptest" is a single target, my goal was to make 2 targets to the same iSCSI virtual disk.
So if you were to right click the iSCSI virtual disk that "chaptest" is assigned to and click "Assign iSCSI Veritual Disk...", then select "New iSCSI Target, and proceed with the wizard it removes the "chaptest" target
and adds the new one just created.
My goal was to have 2 targets to 1 iSCSI VD, but seeing your screenshot, with 2 initiators connected, that goal doesn't seem needed anymore.
I was under the impression that the "User name" = the iscsi initiator IQN name, which had to be unique. That is why I thought I would need 2 targets.
Thanks

How to add a virtual disk into a 'guest VM' after VM has been created?

Well, it was easy when one need to add a virtual disk before creating a guest VM. All need to do was to edit the template and click on disk tab and create a virtual disk.
However the challenge comes after created a 'guest VM'. I need to add additional virtual disk into this 'guest VM'.
This is what I did.
Click on Repositories tab --> Under repositories--> Virtual Disks. There is a green "+" sign. Click on it. It says create virtual disk. Follow the instruction, I enter the virtual disk name, size, and select if it is spare or non-spare. Hit ok. Well, everythings seems fine.
Next, I click on the "blue folder" icon which indicated import virtual disk. It asked me about Virtual disk download location.
According to the manual, http://docs.oracle.com/cd/E27300_01/E27309/html/vmusg-repo.html#vmusg-repo-vdisk
Virtual Disk download location: The URL for the virtual disk file. The URL protocols supported are HTTP, HTTPS, and FTP. For example:http://example.com/vdisks/myvdisk.img
How can I determine what is the URL in my case?
Where is the newly created virtual disk located? Isn't it supposed to be in Oracle Server? But it doesn't have a http server running there.
Please help.
Thank you.

Virtual disks can only be added and removed at runtime from a PVM. You don't even need to know anything special. Just create the vdisk and use the VMs settings to occupy another slot with the new vdisk.
But as I said… this works only with PVMs, not HVMs. In case of a HVM, you will need to shut down the VM and add the disk afterwards, then fire it back up.
The little folder with the blue down arrow is for importing an existing vdisk file from a web- or ftp server. If you have already created the vdisk, you won't need that.

Oracle VM 2.2: why virtual disk must be 1GB or larger?

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