Snap 4500, failed RAID0 - retrieve data

stfn · 04-13-2007, 03:55 PM

Hello. I'm trying to recover the data from a failed volume on Snap 4500. Server is configured with 4x250 ParalelATA HDDs in RAID0 for approx. 1 TB of space. All available space is configured as one volume.
Yesterday all shares (both SMB and AFP) disappeared. Server boot fine, have access to console, but I see the volume as:

Code:

Name RAID Set Size Mount Point Status Quotas 
VOL0 md0 922.50 GB /hd/vol_mnt0 Not mounted Disabled

Also, the Event Log shows thеse errors every two minutes:

Code:

XFS: extended permissions ON kernel Apr 13 18:00:12 
XFS mounting filesystem lvm(58,0) kernel Apr 13 18:00:12 
Starting XFS recovery on filesystem: lvm(58,0) (dev: 58/0) kernel Apr 13 18:00:13 
hde: dma_intr: status=0x51 { DriveReady SeekComplete Error } kernel Apr 13 18:00:18 
hde: dma_intr: error=0x40 { UncorrectableError }, LBAsect=472154114, high=28, low=2392066, sector=469937144 kernel Apr 13 18:00:18 
end_request: I/O error, dev 21:04 (hde), sector 469937144 kernel Apr 13 18:00:18 
I/O error in filesystem ("lvm(58,0)") meta-data dev 0x3a00 block 0x7006adf8^I ("xlog_recover_do..(read#1)") error 5 buf count 4096 kernel Apr 13 18:00:18 
XFS: log mount/recovery failed kernel Apr 13 18:00:18 
XFS: log mount failed kernel Apr 13 18:00:18

The management web page shows also:
Devices:

Code:

Location Model Size Status 
Drive 1 245 GB Maxtor-7Y250P0 230.67 GB Member of md0 (Raid 0)  
Drive 2 245 GB Maxtor-7Y250P0 230.67 GB Member of md0 (Raid 0)  
Drive 3 245 GB Maxtor-7Y250P0 230.67 GB Member of md0 (Raid 0)  
Drive 4 245 GB Maxtor-7Y250P0 230.67 GB Member of md0 (Raid 0)

RAID sets:

Code:

Name Type Group Size Unallocated Space Status 
md0 RAID 0 (striped)  -   922.50 GB 0.00 MB OK

It seems to me it is a software issue (a corruprion in the file system, may be).
Is there a way to retrieve the data on the volume? Again, the OS itself is OK, server boots fine. The data is what is important.

blue68f100 · 04-13-2007, 05:25 PM

Raid 0 has no redundency. Your only option is a recovery service. The os is in a different partition in raid 1 across all drives. If you wanted redundency you need raid 1 or 5.

Contact Douglas with FrontLineDataRecovery 1-866-279-2985
He is normally 25-75% cheaper than any one else. Tell him blue sent you.

I do not like Maxtor's, They have the highest failure rate in the industry. Install WD SE drives.

Phoenix32 · 04-14-2007, 01:09 AM

Important data and RAID 0? Isn't that an oxymoron?

04-13-2007, 05:25 PM	#2
blue68f100 Thermophile Join Date: Jul 2005 Location: Plano, TX Posts: 3,135	Re: Snap 4500, failed RAID0 - retrieve data Raid 0 has no redundency. Your only option is a recovery service. The os is in a different partition in raid 1 across all drives. If you wanted redundency you need raid 1 or 5. Contact Douglas with FrontLineDataRecovery 1-866-279-2985 He is normally 25-75% cheaper than any one else. Tell him blue sent you. I do not like Maxtor's, They have the highest failure rate in the industry. Install WD SE drives. __________________ 1 Snap 4500 - 1.0T (4 x 250gig WD2500SB RE), Raid5, 1 Snap 4500 - 1.6T (4 x 400gig Seagates), Raid5, 1 Snap 4200 - 4.0T (4 x 2gig Seagates), Raid5, Using SATA converts from Andy Link to SnapOS FAQ's http://forums.procooling.com/vbb/showthread.php?t=13820

04-14-2007, 01:09 AM	#3
Phoenix32 Thermophile Join Date: May 2006 Location: Yakima, WA Posts: 1,282	Re: Snap 4500, failed RAID0 - retrieve data Important data and RAID 0? Isn't that an oxymoron?

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