Forum Discussion

Luminary

Jan 28, 2016

Moved drives from Pro 6 to Ultra 6 in same order, volume now missing

I thought if you had the same firmware installed on an intel unit you could move from a pro 6 to an ultra 6 as long as you kept the disks in the same order. I did just that and upon boot up it says r...

ReadyNAS OS 6 on Legacy models

mdgm-ntgr

NETGEAR Employee Retired

Jan 29, 2016

Well that ATA error count is huge, so I wouldn't have any confidence in that disk.

Rebooting. Hopefully it comes up fine now. You should backup your data.

ifixidevices

Luminary

Jan 29, 2016

What is the ATA error count though? These aren't ATA disks, they're sata disks? I've never really got a definitive answer when looking it up.

I'm waiting until they come out with 8 or 10TB WD RED drives.

BTW thank you for fixing the problem and taking time out of your day to resolve the problem. It looks like it did indeed fix it as the volume came back. I do truly appreciate it.

mdgm-ntgr
NETGEAR Employee Retired
Jan 29, 2016

It means the SATA controller on the ReadyNAS was unable to communicate with the hard drive.
- ifixidevices
  Luminary
  Jan 29, 2016
  Oh ok... well that's from months ago during the 6.4.1 debacle... it happened right after the drive was installed and related to that I believe.
  
  Also the drive doesn't show any reallocated or pending sectors when looking at it's status. So it's odd the logs showed that.
- StephenB
  Guru - Experienced User
  Jan 29, 2016
  mdgm wrote:
  
  It means the SATA controller on the ReadyNAS was unable to communicate with the hard drive.
  
  SATA is of course serial ATA, and the command set to communicate with SATA drives is still called the ATA command set.
  
  ATA errors are a bit different from the others, in that they are reported by the NAS and not the drive itself via SMART. Unlike SMART errors, the problem isn't automatically isolated to the drive - the root cause could be driver software, or NAS hardware, or the drive, or maybe even the SATA connection. http://kb.netgear.com/app/answers/detail/a_id/19392/~/ata-errors-increasing-on-disk(s)-in-readynas
  
  FWIW, I have had one drive that suddenly started generating these errors. Even though it passed vendor diags and had no SMART errors, I replaced it - and in my case the problem disappeared.