CSV disk signature and backup

I would like to be able to take a snapshot backup of a CSV directly from my SAN and mount it back into the cluster in orer to recover files.
Right now, if i do this, the cluster detects the disk as a CSV (presumably a pre-existing CSV), i guess there is a signature on the disk identifying it as a particular cluster shared volume. This makes perfect sense.
Is there some way of remove this signature\ID, to ostensibly allow me to have two copies if the same disk mounted at any one time? I.e. one as CSV, which remains unaffected and in use, and one as a 'normal' disk which i can mount and assign a drive letter
to?
Cheers.

Mount the disk on a standalone system and use diskpart to change the signature, then mount the disk with the changed signature on the cluster.
DISKPART> list disk
DISKPART> uniqueid disk (get current signature)
DISKPART> select disk ID
DISKPART> uniqueid disk ID=[NEW SIGNATURE]
. : | : . : | : . tim

Similar Messages

Disk size and backups

Hello
I wander what is required disk size on hana when migrating from e.g Oracle to Hana?
E.g under oracle I have 1Tb database (and something more if I backup also at OS level)
What will I have under Hana ? How much to backup?
Thank you a lot
Jan

Dear Jan,
The first thing we need to perform before migrating from AnyDb to HANA is memory sizing. SAP provides specific notes for memory sizing of different SAP Applications as mentioned bel ow
1793345 - Sizing for SAP Suite on HANA
1637145 - SAP BW on HANA: Sizing SAP In-Memory Database
1872170 - Suite on HANA memory sizing
1736976 - Sizing Report for BW on HANA
The objective if the the above is to get the footprint of uncompressed DATA in AnyDB.
That forms one of the parameter for sizing the HANA DB.
Based on this sizing information one would use the suitable T-Shirt sized HANA Appliance from the hardware vendor. We then have to apply the
Traditional the RAM should be atleast 2x(uncompressed_DB / Compression factor) and the Disk space would be at least 3-4xRAM for persisitance layer and 1xRAM for logs.
The compression factor might be around 4-7 times depending on the type SAP application.
Regards
Arshad

Encrypted Disk Image and Backup

If one uses Apple’s Disk Utility to create an encrypted disk image, what happens when SuperDuper, Time Machine, or any other backup utility is running while the (unencrypted) image is mounted on the desktop?
Are both the encrypted image and the unencrypted data transferred to the backup device? Or is just the secure encrypted data copied to the destination?
Nothing urgent on this, just curious. Thank you!

I've played around with this a little. As best I can tell, when cloning an entire HD volume both CCC and SuperDuper will always copy an image file (.dmg, .sparsebundle, etc) that resides that on that HD, whether or not that file's disk image is mounted at the time. However the contents of the mounted disk image volume will not be copied separately, and so If the disk image is encrypted, no unencrypted content will get transferred this way. However as mentioned in the SuperDuper link above, it's better to unmount the image in any event, in order to ensure that the underlying .dmg or .sparsebundle file gets copied faithfully.
If you want to copy the contents of a mounted disk image with CCC or SuperDuper, you can do so as a completely separate procedure from copying the HD. If you first mount the image (giving a password if it was encrypted), that mounted image will appear as an independent volume in the "source list" of CCC or SuperDuper, and you can choose that volume as a source for the copy procedure. You would need to designate a different target volume as well, so as not to overwrite your HD clone. If the disk image was encrypted and you deliberately copy its mounted image separately in this fashion, the resulting files on the target will not be encrypted.

Disk Image and Backups

I need an expert response here... I need it to be objective as possible to the goal that I am trying to accomplish and that is the following. I want to be able to create a system backup wherever I am in the world in as short a period of time without the install DVD's. What is the best way?
For example can I create a disk image of my hard drive using Disk Utility? If so, and I encounter a catastrophic failure, and I have that disk image on DVD or a external FireWire drive could I just reload that image and then be back up and running? If that is true, what would be the process using Disk Utility to create that image and the process to restore it as well? Please provide as detailed info as possible about the process?
Now I do regular backups using Time Machine. But does Time Machine afford me the same opportunity as a disk image? For example if I encounter a failure, can the external drive that I am using for Time Machine create a complete system restore without the install DVD? Or is the disk image the only way?
I do understand that with the disk image I would always have to be updating it to make sure I have the latest files. However, as it stands right now, I have all essential files that I would need already on my hard drive ready for the disk image if that is the way to go. All my other files would be on my iDisk or external Hard Drive. I appreciate anyone who can shed some light here.
I did some digging on the support.apple.com site and I also wondered will I always need the install DVD to get to Disk Utility or is there another way with the DVD?
Mike
Message was edited by: Michael710
Message was edited by: Michael710

Michael710 wrote:
I did some digging on the support.apple.com site and I also wondered will I always need the install DVD to get to Disk Utility or is there another way with the DVD?
What you will always need to run Disk Utility is:
1. A functioning OS
2. A copy of Disk Utility on accessible media
Put another way, Disk Utility is an application. No application can stand alone -- they all depend on an operating system being up & running to supply the essential services they need.
This means you can't just "reload" an image without first booting into a working OS from some source. This could be the installer DVD, a flash drive with the OS installed on it, or an external drive. It can't be the internal drive if it has problems.
Since you have to have a separate source for both the OS & Disk Utility, you might as well consider the clone option already mentioned. The downside is that this requires a large enough external drive to hold everything, so a cheap flash drive probably won't suffice. The upside is you don't have to image or restore anything -- just boot from the clone & keep working, repairing/restoring the internal drive whenever it is convenient.

Disk failure and Backup procedures

tl;dr: recommendations for data recovery software on a failing hard drive?
Hello Forum,
I have a PC with two drives, an 1TB HD with /home mounted on it and a 40GB SSD with everything else.
At some point working on a document, I had trouble saving it and the applications started to stutter. I immediately checked dmesg wich returned a bunch of errors so I proceeded to turn off the machine.
I disconnected the /home HD and I can boot in "emergency mode" as root. The relevant system logs ( # journalctl --since=2013-01-29 | grep sdb) show as much as 50 times per second the following lines:
sd 3:0:1:0: [sdb] Unhandled error code
sd 3:0:1:0: [sdb]
sd 3:0:1:0: [sdb] CDB:
Also, when it all started, there were a lot of lines mentioning
Buffer I/O error on device sdb3, logical block 7555XXXX
Where XXXX just kept increasing one by one.
Is that sure sign of a physical failure or can these symptoms arise from other causes?
As I am presuming a physical failure, I am planning to buy tomorrow another HD of the same size and try to recover the maximum possible amount of data. I have read on the Internet that the first thing would be to try to image it, maybe using several runs of an imaging software.
Do you know of a good software to do this type of work?
Cheers,
-- adelgado

First: Boot from a live-cd, to prevent unnecessary mounting of your disks (System Rescue CD comes with ddrescue).
"dd" is usually recommended for imaging. However, you might want to take a look at ddrescue instead. ddrescue is more resistant to read-errors, and I higly recommend using its log-feature - Take a look at its homepage.
Here's a bit more about imaging hard drives with ddrescue.
NB: There is another program called dd_rescue, which I have no experience with.
Last edited by graph (2013-01-26 21:24:01)

2012R2 Checkpoint Backups Fail - "The disk signature of disk1 is equal to the disk signature of disk0"

Before reading any further please note there are no actual disk signature problems per other threads on technet. I mounted all VHD's on the host and none reported offline. I manually checked all VHD disk signatures to the host and all were unique. I loaded
a brand new fresh 2012R2 VM/VHD and at first fine, but after installing updates the problem occurs.
I believe a Windows Update is causing this error but do not know which one. I had a 2012 (non r2) VM that backed up fine, however after upgrading it to 2012R2 integration services and updates, this VM also has the below listed errors. Whether or not there
is only one disk in the VM or multiple the following error is occurring. If I save all the VM's first I get a good and successful backup and checkpoint/snapshot transfers to backup location correctly. It is only when the VM's are running and checkpoint the
process fails.
When a backup is initiated on the 2012R2 host the VM's enter into the backing up state and are still live (not saved).
The following sequence of events occur in the VMs:
Event ID: 58
Source: partmgr
"The disk signature of disk 1 is equal to the disk signature of disk 0"
Event ID: 7036
Source: Service Control Manager
"The portable device enumerator service service entered the running state"
Event ID: 58
Source: partmgr
"The disk signature of disk 1 is equal to the disk signature of disk 0"
Event ID: 98
Source: Ntfs
"Volume E: (\Device\HarddiskVOlume3) is healthy. No action is needed"
Event ID: 98
Source: Ntfs
"Volume F: (\Device\HarddiskVolume4) is healthy. No action is needed"
Event 157
Source: Disk
"Disk 1 has been surprise removed"
I can see in device manager that a Microsoft Virtual Disk is created and then disappears (greys out if viewing hidden devices)
Once Event 157 occurs, the VM's are merged back successfully and the following error occurs on the host.
Log Name: Application
Source: VSS
Date: 4/26/2014 8:00:58 PM
Event ID: 8229
Task Category: None
Level: Warning
Keywords: Classic
User: N/A
Computer: SERVER
Description:
A VSS writer has rejected an event with error 0x800423f3, The writer experienced a
transient error. If the backup process is retried,
the error may not reoccur.
. Changes that the writer made to the writer components while handling the event will not
be available to the requester. Check the event log for related events from the application
hosting the VSS writer.
Operation:
PostSnapshot Event
Context:
Execution Context:
Writer
Writer Class Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
Writer Name: Microsoft
Hyper-V VSS Writer
Writer Instance ID: {2aa82577-e446-4340-9afe-1e75fa3a52d4}
Command
Line: C:\Windows\system32\vmms.exe
Process ID: 2088
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
<System>
<Provider Name="VSS" />
<EventID Qualifiers="0">8229</EventID>
<Level>3</Level>
<Task>0</Task>
<Keywords>0x80000000000000</Keywords>
<TimeCreated SystemTime="2014-04-27T03:00:58.000000000Z" />
<EventRecordID>2254</EventRecordID>
<Channel>Application</Channel>
<Computer>SERVER</Computer>
<Security />
</System>
<EventData>
<Data>0x800423f3, The writer experienced a transient error. If the backup process is
retried,
the error may not reoccur.
</Data>
<Data>
Operation:
PostSnapshot Event
Context:
Execution Context: Writer
Writer
Class Id: {66841cd4-6ded-4f4b-8f17-fd23f8ddc3de}
Writer Name: Microsoft Hyper-V VSS
Writer
Writer Instance ID: {2aa82577-e446-4340-9afe-1e75fa3a52d4}
Command Line: C:
\Windows\system32\vmms.exe
Process ID: 2088</Data>
I have found no relevant information regarding this error please advice if anyone has opened a case on this and has a reported solution. It appears to be an issue with the new checkpoint process in 2012R2 possibly created by a recent update.
Thanks in Advance

Hi CCPD,
Thanks for contacting Microsoft.
From your description, I learnt that the issue you are experiencing is that you failed to backup VMs when the VM is running. Pleas let me know if I misunderstand anything.
Firstly, please let me know which backup tool you are using to perform backup. And please let mw know how the issue goes if you use Windows Server Backup feature.
After that, please install the Windows Server 2012 R2 newest update rollup as below.
==========================================================
Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: February 2014
http://support.microsoft.com/kb/2919394
Best regards,
Sophia Sun
Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Script to list Hyper-v CSV disks and their LUNs

Hi all
I am getting to grips with powershell now but one thing i am struggling to do is create a script that will query CSV's volumes and show their SAN volume LUNs.
Have searched frantically and pieced together something, which uses two WMI queries to gather the information and then use the signature to match them up. However, some CSVs do not come back with a signature.
Now surely to match a CSV with the corresponding physical disk and thus its LUN should be easy. Looks like lots of people have tried to crack this with WMI queries and even using diskpart. But their has to be an easy way. We are running 2012 Hyper-v
and 2012 R2 clusters. So a solution for either platform would be good.
Thanks

Hi Chris Ryan,
To get the CSV and their LUNs , you can start the
Failover Clusters Cmdlets in powershell, please check the script below:
Getting More Information About You Cluster LUN’s
Best Regards,
Anna

Event ID 58 - Disk signature error only while backup job

Hi,
Host 2012R2 with Hyper-V-role, Backups are done with DPM 2012R2.
While job is working, three warnings are recorded in event-log of the guest:
partmgr / Event ID 58 / The disk signature of disk 2 is equal to the disk signature of disk 1.
partmgr / Event ID 58 / The disk signature of disk 2 is equal to the disk signature of disk 1.
partmgr / Event ID 58 / The disk signature of disk 3 is equal to the disk signature of disk 0.
This happens in all guests (with different disk numbers). No corresponding error on Host or DPM. Registry of each guest is growing in these keys:
HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2
The popular hint "attach the VHDs, bring them on- and offline, detach" brings no solution. As Mike Jacquet from Microsoft told in
this thread, it is a problem of Hyper-V and not DPM.
Has anyone a solution for this? Thanks!

Hi,
I don’t found the issue, please install all the update then try the backup action again.
Through the error message it clearly mentions Disk Signature conflict, please try the following troubleshooting steps, then tell us the result.
1. Download DEVNODECLEAN.zip from http://www.microsoft.com/en-pk/download/details.aspx?id=42286 and extract it on the affected server.
2. Now using an elevated command prompt change directory to the folder where contents of DevNodeClean.zip are extracted.
3. Run the command DevNodeClean.exe /N >PhantomDev.txt
4. After the above command run another command DEVNODECLEAN.exe
5. After the command is executed you will see an output to conform it has deleted the Phantom devoices you can run the command from step 4 again and the output shall be blank.
6. After this you can try to run the DPM Consistency Check again and check if the same events are getting logged as before complaining about Duplicated Disk and Signatures.
More information:
Fixing Disk Signature Collisions
http://blogs.technet.com/b/markrussinovich/archive/2011/11/08/3463572.aspx
Hope this helps.
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.

Help needed. I have a 3TB external hard drive partitioned into 1TB's. I used one partition as backup for the main computer hard drive. But now it is greyed out as shown in the disk utility and its name changed, i dont know how that happened, i tried verif

Help needed. I have a 3TB external hard drive partitioned into 1TB's. I used one partition as backup for the main computer hard drive. But now it is greyed out as shown in the disk utility and its name changed, i dont know how that happened, i tried verifying and repairing it but had no luck. I also tried mounting and unmounting it but still no solution. Anyone to help please?

Looks bad. I would strongly advise backing up the stuff on the other two partitions as soon as possible in case the rest of the drive goes wrong.
Beyond that, Disk Utility has limited abilities to repair disks, DiskWarrior uses a different approach and might, emphasis might be more successful. It has certainly done the job for me in the past when Disk Utility could not.
See http://www.alsoft.com/diskwarrior/

Disk Utility Image backup - 8 hours and counting. ?

So I'm doing a backup image in Disk Utility. Started up from the install DVD 10.6 and went into D U and making an image of my Macbook's (2008) HD (250gb) and saving it to a WD usb 2.0 external drive. I'm going on 8 hours. I know it takes a while but I swear my iBook from 2002 is faster on USB 1.0 . Is this normal? I feel like I would have been better off putting it in Target Disk Mode and used another Mac to back it up instead. I want all my data after the restore so I thought the image was the best way to go. This can't be the fastest way. Would this go any faster on FireWire? I know the file transfer itself can't take 8 hours can it? I'm miffed. Any advice?
PS - Used SuperDuper a month ago and that took 7 hours.

Thomas A Reed wrote:
+_Also, why did you boot from the install disk? That is absolutely not necessary. I'd also absolutely, 100% recommend against using disk images for backup. Large disk images are too easy to corrupt, which will cause you to lose everything they contain. They're just not good enough for backups. Use [Carbon Copy Cloner|http://www.bombich.com> or SuperDuper instead...+_
I was following Apple's instructions http://support.apple.com/kb/ht1553
I had it backed up in SuperDuper and Time Machine as well. I knew I could get all of my data with an image and I've never used SD for importing data, only whole disk images.
_+You didn't say how full your hard drive is. If your drive isn't anywhere near capacity, it shouldn't be taking that long. If it is too close to capacity, that could be part of the problem.+_
Yeah, I was at 240/250gb. I didn't think about that. Thats also good to know.
The external 1TB WD USB2 drive I used was the same drive that a few months back I transferred 900+ gigs to from my W7 computer with a esata drive. (1tb WD usb2 to esata 1tb through my W7 PC). While I know the esata is super fast, that WD 1TB USB2 drive "was" fast (35 - 50 sustained speed?) and it took maybe six hours for 900+gb. Thats why I'm confused.
All in all I really don't care if it takes that long if I know that ahead of time. It's one thing to hit a button and go to sleep, but another to get it done ASAP because it's 5am and I should have been done by midnight at the latest. I need to use it all day today.
Thanks guys.
Message was edited by: dtommyd2

I am trying to do a full Time Machine Backup to a new external disk. The backup starts, and it says "Time remaining about 4 days." That seems like a very long time, but the real problem is that the computer "logs off" after a few hours, and the b.u. stops

I am trying to do a full Time Machine Backup to a new external disk. The backup starts, and it says "Time remaining about 4 days." That seems like a very long time, but the real problem is that the computer "logs off" after a few hours, and the backup stops. The system preferences are set to "Never" for Computer sleep and Display sleep. The computer does not ordinarily log off automatically, but it has done this twice since I started the Time Machine backup.

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter the word "Starting" (without the quotes) in the String Matching text field. You should now see log messages with the words "Starting * backup," where * represents any of the words "automatic," "manual," or "standard." Note the timestamp of the last such message. Clear the text field and scroll back in the log to that time. Select the messages timestamped from then until the end of the backup, or the end of the log if that's not clear. Copy them (command-C) to the Clipboard. Paste (command-V) into a reply to this message.
If all you see are messages that contain the word "Starting," you didn't clear the search box.
If there are runs of repeated messages, post only one example of each. Don't post many repetitions of the same message.
When posting a log extract, be selective. Don't post more than is requested.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Some personal information, such as the names of your files, may be included — anonymize before posting.

Is there any way that I can get back my iPhoto? After having hard disk replaced (no backup) and the operating system has been updated to Lion (no disc) I am wondering if iPhoto can be reinstalled with my Leopard discs?

Is there any way that I can get back my iPhoto? After having hard disk replaced (no backup) and the operating system has been updated to Lion (no disc) I am wondering if iPhoto can be reinstalled with my Leopard discs?

As Niel pointed out, yes. The disk probably will look like the MBP disk (4) in this screenshot;
OT

My hard disk crashed and the backup of my library was not saved. Fortunatly my music files are on a seperate server. How can I sync my Playlists back in my library?

My hard disk crashed and the backup of my library was not saved. Fortunatly my music files are on a seperate server. How can I sync my Playlists back in my library?

Syncing to a "New" Computer or replacing a "crashed" Hard Drive: Apple Support Communities

When doing catalog backup get message " your system is low on disk space, and elements organizer can

When doing catalog backup get message " your system is low on disk space, and elements organizer cannot perform the operation. If create a catalog with 20 pictures backup works OK. backing up to a 1TB external drive. Have 16705 pictures in catalog. Total disk space for pictures is 192 MB. Why am I getting message?

kdrozzen a écrit:
Total disk space for pictures is 192 MB.
Do you really mean MB (megabytes) or GB (gigabytes) ?
Even if its GB, the free space may be enough, depending on your files size, especially with videos or raw files.
When you start the backup process, it first shows you the total size of the catalog.

My laptop hard disk crashed and i could not take backup of iTunes.

My laptop hard disk crashed and i could not take backup of iTunes. I installed a new hard disk and installed i Tunes but If i connect my iphone 3Gs to the fresh installed iTunes, will all the music and apps on my phone get erased ? How to sync my phone so that it does not get erased.

See Recover your iTunes library from your iPod or iOS device.
tt2

CSV disk signature and backup

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