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NV+ Bad Disk #1... Replace with unit on or off?
Hello,
I'm having some issues booting an NV+ with a bad disk (unit has 4x 750GB ST3750640AS in XRAID.)
Initial problem was reported as a dropped network share for the local workstations accessing the unit. Upon investigation, the NV+ unit was found to be locked up and completely unresponsive - lcd panel off, no messages, no email of failure. Shutdown was not possible via the power button or admin control panel, so cord was unplugged.
Reboot attempted with all 4 disks in; hung on FS Check, powered down again via power cord after 10+ hours sitting hung.
Reboot #2 attempted with all 4 disks; this time was able to find unit with RAIDar, wich reported the correct used/free space size of volume C, but showed significant error count on disk 1. Some errors on disk #2 and disk #3, none on disk #4. Boot process finally hung, unit dropped off of RAIDar, and was unresponsive via power button. lcd reports "booting..." Power cord pulled to shut down.
Next attempted booting with one each of the 4 disks removed, results as follows:
disk 4 out = hangs on boot
disk 3 out = lcd reports "bad disk found", then hangs on boot
disk 2 out, attempt #1 = lcd reports "kernel panic"
disk 2 out, attempt #2 = lcd reports "bad disk 1"
disk 1 out = successful boot, no shares, no volume data, disk 2 shows 16GB free, disk 3 shows 16GB free, disk 4 shows 696GB free. lcd reports proper IP address and 0GB used/0GB avail storage info.
My question is this: Do I replace disk #1 with the power off then attempt to boot, or do I boot with disk #1 removed and then plug in the new drive after unit has finished booting? ...OR... are neither of these a good idea?
Thanks in advance for any assistance in this matter.
I'm having some issues booting an NV+ with a bad disk (unit has 4x 750GB ST3750640AS in XRAID.)
Initial problem was reported as a dropped network share for the local workstations accessing the unit. Upon investigation, the NV+ unit was found to be locked up and completely unresponsive - lcd panel off, no messages, no email of failure. Shutdown was not possible via the power button or admin control panel, so cord was unplugged.
Reboot attempted with all 4 disks in; hung on FS Check, powered down again via power cord after 10+ hours sitting hung.
Reboot #2 attempted with all 4 disks; this time was able to find unit with RAIDar, wich reported the correct used/free space size of volume C, but showed significant error count on disk 1. Some errors on disk #2 and disk #3, none on disk #4. Boot process finally hung, unit dropped off of RAIDar, and was unresponsive via power button. lcd reports "booting..." Power cord pulled to shut down.
Next attempted booting with one each of the 4 disks removed, results as follows:
disk 4 out = hangs on boot
disk 3 out = lcd reports "bad disk found", then hangs on boot
disk 2 out, attempt #1 = lcd reports "kernel panic"
disk 2 out, attempt #2 = lcd reports "bad disk 1"
disk 1 out = successful boot, no shares, no volume data, disk 2 shows 16GB free, disk 3 shows 16GB free, disk 4 shows 696GB free. lcd reports proper IP address and 0GB used/0GB avail storage info.
My question is this: Do I replace disk #1 with the power off then attempt to boot, or do I boot with disk #1 removed and then plug in the new drive after unit has finished booting? ...OR... are neither of these a good idea?
Thanks in advance for any assistance in this matter.
12 Replies
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- If I am reading this correctly, you have not found a way to reboot that preserves your data - correct?
Also, what error stats are you seeing on disk 1, disk 2, and disk 3? - Correct - I have yet to complete the boot sequence successfully wherein I can access my data.
RAIDar was the only place I could see the stats, and I actually saw 2 different sets of info during the same boot sequence. Initially, errors were reported on disks 1, 2, and 3 at 1000+, 300+, and 51, respectively (no, I never got any smart error notifications via email - but I don't regularly log in to the admin control panel either.) After a refresh, RAIDar then reported the disk errors for 1, 2, and 3 as none, 450, and 1, respectively. At no point were errors reported on disk 4.
Should I try cloning disk 1 to the replacement disk, or will the unit sync the new drive at/after boot? - Since you aren't seeing data with disk 1 removed, then you won't see data after you resync a replacement disk either.
Do you have a windows PC? If so, the next step would be to shut down the NAS and run vendor diags on the three disks (seatools for seagate, lifeguard for western digital). - Yes - I'll start that now then. Seatools it is...
Let's assume for a moment that the vendor tools find and correct errors on the disk. Should I hope to be able to re-install it in the unit without data loss, or am I out of luck? - I wouldn't attempt to correct, instead I'd just see if they pass the generic tests and look at the SMART data. If seatools doesn't show SMART data, then Acronis Drive Monitor is one freeware tool that will.
At this point I'm thinking that you might need to use either a data recovery service or a data recovery tool of some sort. I have no experience with either though.
One option is to rebuild the NAS with 2x2TB drives (for instance WD20EFRX), and keep the existing drives intact. That would give you more space and 2 expansion slots. If you have 3 failing disks it probably is the same price or cheaper.
BTW, label them by slot as you remove them for testing. Swarty210 wrote:
Should I try cloning disk 1 to the replacement disk, or will the unit sync the new drive at/after boot?
You could try cloning disk 1 to the replacement disk, using a cloning tool on a PC.
You can then try the clone in slot 1 and try to boot. If the clone is successful, the readynas shouldn't try to resync to that disk.
Yes, but if he isn't seeing data when he boots up w/o disk 1, he still won't see it when he boots up with the cloned disk.vandermerwe wrote: Swarty210 wrote:
Should I try cloning disk 1 to the replacement disk, or will the unit sync the new drive at/after boot?
You could try cloning disk 1 to the replacement disk, using a cloning tool on a PC.
You can then try the clone in slot 1 and try to boot. If the clone is successful, the readynas shouldn't try to resync to that disk.
So I don't see much point to it.- With a disk that is not the parity disk failed in an X-RAID array in the NV+ (v1), the NAS may fail to boot.
StephenB wrote:
Yes, but if he isn't seeing data when he boots up w/o disk 1, he still won't see it when he boots up with the cloned disk.vandermerwe wrote: Swarty210 wrote:
Should I try cloning disk 1 to the replacement disk, or will the unit sync the new drive at/after boot?
You could try cloning disk 1 to the replacement disk, using a cloning tool on a PC.
You can then try the clone in slot 1 and try to boot. If the clone is successful, the readynas shouldn't try to resync to that disk.
So I don't see much point to it.
I thought, as OP had got closest to booting with all 4 disks in, that a clone may allow the unit to boot without declaring disk 1 as having failed.- It's possible adding a brand new disk while the NAS is off would allow the array to rebuild and then to boot, but it does depend on the state of the array, volume etc.
Do you have a backup?
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