Ultra 4 dead disk & re-striping time

It should take 5-8 HOURS to resync, not days. Did you remove the disk in bay 4 while the unit was resynching?

What is the status of your backup? Do you have a current and complete one?

Yes I removed dead disk while re-striping was occurring. I figured with front panel displaying 0.0% complete for last 4-5 days it was not doing anything. I have current backup that should be good on external USB drive. I was able to access my data OK after disk 4 went dead. But once I tried to export log files the unit hung and has since been unable to access. if it really was re-stripping curious if I power off unit what will happen . I could go to backup if I need but I also have 'Time Machine' partition that I don't have backed up but if I loose that I can recover.

I'm starting to get concerned as I read more post of users getting dead disk errors after upgrading to 4.2.22 which I did also. Failure came a few days afterward. :evil:

I'm sure, just by coincidence, that some users will experience disk failures that are temporally related to firmware upgrades. There is then forum publication bias - users who experience problems will post, those without problems (the vast majority), will not post.
I suspect these failures are not attributable to the upgrade itself.

I'm one not to jump on the bandwagon but this has not been going well for me so far and it probably is a coincidence. I'll also admit I know very little about the Ultra 4 and it's file structure. It has been working GREAT for last 2 years. I'm pretty sure 4-5 days of re-striping might be too long? Since unit has been unreachable after trying to export log file, I have manually powered off and inserted new hard drive in bay #4. How long should I expect to see 'Booting... Testing Disk 4' on front panel for a 2TB HD? Thanks.

I'm not suggesting you don't have a disk problem - you do; just that its probably not related to 4.2.22.
The unit is probably not going to come online again until you get a new disk in, but given the unusual behaviour and the fact that you can't shut it down formally, you may face a greater risk of data loss.
You could be really careful and contact support, or you could force a shut down, insert a new disk into 4, and try to boot.
There is a risk to data as you will be left with only one copy if this fails and the NAS starts to build a new volume,

Edit: sorry just seen you post. Testing does not take that long, the unit should be complete with testing and resync within 12 hours for a 2 tb

Ok, I'll wait the 12 hrs or more. Sometime tomorrow I'll see if it has finished 'Booting.... Testing Disk 4' and has resync'd. Thanks for your suggestions.

Did you test the disk using vendor tools when you bought it?

I connected it to Mac as external USB and used Mac Disk Utility to partition and format and 'verified. But I didn't run a 'disk test' utility beyond that. I guess assuming a new disk is OK isn't a good practice? It's a Seagate listed on the compatibility list. I'll kill the Ultra 4 boot and disk testing thats running now, remove disk and find a utility from Seagate to download. Thxs.

What should happen if I just remove disk 4 and boot without inserting a new disk into bay 4? Should it boot up OK and will it restripe on 3 disk instead of 4 disks?