DSM-G600, DNS-3xx and NSA-220 Hack Forum

asphodeli · 2008-06-22 04:12:22

Hi guys,

I've bought the DNS-323 recently, and have done a simulated HDD failure on the unit. Original configuration is this:

1x 750GB Seagate ES
1x 500GB Hitachi DeskStar

configured as:

498GB RAID 1 shared as Volume_1
250GB JBOD shared as Volume_2

After the simulated HDD failure (take out Hitachi drive while NAS is powered down, deleted all partitions, and re-inserted), and re-sync, Volume_2 has disappeared! Can anyone tell me how to get Volume_2 back? Thanks alot! I'm running FW version 1.05.

PS: I've got nothing stored on the hard drives, besides fun_plug and debian etch, so its a no-worry thing

Last edited by asphodeli (2008-06-22 04:22:22)

fordem · 2008-06-22 04:27:45

In a nutshell - you can't - RAID1 will allow your data to remain available when a disk fails, however, in all other configurations, a disk failure will result in data being lost.

With standard disks, you can expect the data contained on the failed disk to be lost, with RAID0 & JBOD you can expect the loss of ALL your data if either disk is lost.

asphodeli · 2008-06-22 13:08:40

Ah, I get it now. I should have read the Linux RAID HOWTO. Okay, if that's the case, I need the extra 250GB space available after RAID 1 failure, is it possible to format the drives manually to RAID 1 (498GB) with the remaining space as standard, and not JBOD?

bq041 · 2008-06-23 15:20:21

No matter how you set it, you will still lose. If you set it up for standard, the space will still be lost on 1 disk after a drive failure (assuming a HD failure, and not just a sync failure). Keep in find, the RAID will still be going with your data after a single drive failure, that is the redundancy part. Why do you need separate space after a raid failure?

asphodeli · 2008-06-28 08:23:04

bq041 wrote:
No matter how you set it, you will still lose. If you set it up for standard, the space will still be lost on 1 disk after a drive failure (assuming a HD failure, and not just a sync failure). Keep in find, the RAID will still be going with your data after a single drive failure, that is the redundancy part. Why do you need separate space after a raid failure?

Well, its the loss of the 250GB storage on the 750GB hard drive, that's why

bq041 · 2008-06-30 15:54:45

I'm sorry, I still don't follow

DSM-G600, DNS-3xx and NSA-220 Hack Forum

Announcement

#1 2008-06-22 04:12:22

RAID 1 recovery successful, but JBOD partition missing

#2 2008-06-22 04:27:45

Re: RAID 1 recovery successful, but JBOD partition missing

#3 2008-06-22 13:08:40

Re: RAID 1 recovery successful, but JBOD partition missing

#4 2008-06-23 15:20:21

Re: RAID 1 recovery successful, but JBOD partition missing

#5 2008-06-28 08:23:04

Re: RAID 1 recovery successful, but JBOD partition missing

bq041 wrote:

#6 2008-06-30 15:54:45

Re: RAID 1 recovery successful, but JBOD partition missing

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