Forum Discussion

Initiate

Jun 01, 2019

Ultra 6 on OS6 hangs every few days, now refuses to boot

I have an Ultra 6 Plus upgraded to 4gb of RAM and a Core2Duo E7500. It's been running for years on OS4, zero hiccups in stability. I recently and upgraded it to OS6.9 and stability has gone way d...

Anonymous

Jun 02, 2019

Hi secundo, I do not have experiences with Ultra 6 on OS6, but if you like I could give you my 2 cents how I would tackle this situation:

1) Shutdown the nas and remove the disks keeping in mind, which disk belongs to which bay

2) Insert a spare disk into bay1 (could be any bay; size probably does not matter as long it is sata; not too big; lets say 1 or 2 TB; the disk needs to be blanked before inserting; no partition on it - nothing)

3) Do a MickeyMouse-installation to get the latest OS 6.10.1 installed completely to nas and spare disk.

4) Shutdown the nas, remove the spare disk and reinsert your production disks into the bays they came from.

5) Reboot the nas. As it now cannot fall back behind 6.10.1 you will see, what it will do to the crippled installation on the production disks and hopefully it will do good. As you know, OS6 is not officially supported on your nas. So in the worst of all possible worlds don't be too disappointed, if the result is not as you hoped.

Anybody else?

Good luck with fixing and kind regards

secundo

Initiate

Jun 03, 2019

Retired_Member Thanks for your reply! I tried your trick but it didn't get me anywhere. I was able to update the NAS to 6.10.1 and then do an OS Reinstall, but it's still booting in safe mode. The web UI now shows 6.10.1, so at least that part worked!

StephenB Thanks for your reply! Here's what I see in the Boot Menu

Normal
Factory Default
OS Reinstall
Tech Support
Skip Vol Check
Memory Test
Test Disks

If I'm using XRAID2 with double parity with 6 disks, would plugging in only one disk give me any results?

StephenB
Guru - Experienced User
Jun 03, 2019
secundo wrote:

Here's what I see in the Boot Menu

Normal

Factory Default

OS Reinstall

Tech Support

Skip Vol Check

Memory Test

Test Disks

Interesting. I'd always assumed that the conversion process would replace "skip volume check" with "volume read only". Still it might be worth trying that option.

secundo wrote:
If I'm using XRAID2 with double parity with 6 disks, would plugging in only one disk give me any results?

I somehow got mixed up on your RAID mode. You'd need to connect at least 4 disks to the PC to recover data there.

FWIW, XRAID branding has shifted a bit over time. XRAID2 was the OS 4.2.x version (and the "2" didn't mean double parity - it meant "version 2 of XRAID"). OS 6 just called it XRAID again. By default it has single parity, though you can set it up as RAID-6 (switching to flexraid, destroying the data volume, creating a new data volume as RAID-6, and then switching back to XRAID).
- mdgm
  Virtuoso
  Jun 03, 2019
  StephenB wrote:
  
  Interesting. I'd always assumed that the conversion process would replace "skip volume check" with "volume read only". Still it might be worth trying that option.
  No, though I had thought so for a while.
  
  You can modify /etc/fstab on the root volume, or do certain modifications to syslinux.cfg on the internal flash but that’s more risky.
  
  In any case the error message in safe mode would suggest a problem with the 4GB root volume more so than the data volume. Volume read-only wouldn’t help if the problem is on the 4GB root volume.