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[njphones]

I have a DNS 323 with two Seagate Barracuda 7200.12 - hard drive - 1 TB - SATA-300 that I bought new.

My Raid1 keeps failing-shows a status of Degraded. I have to continuously reformat and rebuild my dives. I have the latest firmware-1.08. It happens regardless of choosing best performance or most stable. It used to happen every couple of months, now it seems to happen every few weeks.

It is a persistant problem that has me baffled and I was wondering if there is a fix for this or something that I can try to troubleshoot. The problem is getting worse.

[dosborne]

I'd try replacing the drive that keeps failing.......

[jamieburchell]

I would turn off the NAS, remove the drives and insert them direct in a PC and use Seatools to test them both.

You might also want to try resetting the NAS to factory defaults.

[njphones]

I do not think that it is the drives-they were brand new and the odds of getting two bad drives? Also, I have tried switching the slots (after reformatting) and the problem happens in either slot, on either drive. I noted each failure and what drive failed.

If I restore the unit to factory defaults, would I need to upgrade the firmware afterwords?

[jamieburchell]

No need to re-flash the firmware after a reset.

I'm not sure switching hard drives in a RAID array is a good idea ?

Could be bad batch of disks if they were purchased at the same time.

[njphones]

I switched them after they were reformatted as single disks.

After reading some posts here I am considering going to two individual disks and abandoning the Raid 1 all together. Instead I would just back up Volume 1 to Volume 2.

This appears to be a better solution because I would not have to worry about the Raid 1 degrading.

Is there a reason not to do this?

[gunrunnerjohn]

The only thing that RAID-1 brings to the party is enhanced availability of the data.  Separating them and doing duplicate copies is better backup than RAID-1.

[jamieburchell]

This appears to be a better solution because I would not have to worry about the Raid 1 degrading.

Clearly you won't get any RAID degraded errors if you're not running a RAID, but Id be concerned as to why the NAS thinks there is a problem with your drives. Hence the disk check suggestion...

[njphones]

The only thing that RAID-1 brings to the party is enhanced availability of the data.  Separating them and doing duplicate copies is better backup than RAID-1.

I believe you. In fact, it was reading your posts that convinced me.

[gunrunnerjohn]

I agree with Jamie on the problem isolation.  I ran my DNS-323 in RAID-1 for over a year, so with good drives it should work fine that way.

[njphones]

Clearly you won't get any RAID degraded errors if you're not running a RAID, but Id be concerned as to why the NAS thinks there is a problem with your drives. Hence the disk check suggestion...

I guess it is my opinion the the issue is with the unit and not the disks.  If I eliminate the Raid issue and the disks fail then I know it is not the unit.

[njphones]

Clearly you won't get any RAID degraded errors if you're not running a RAID, but Id be concerned as to why the NAS thinks there is a problem with your drives. Hence the disk check suggestion...

Good point, I will run the tool on my disks.

[jamieburchell]

Make sure you have another backup

[njphones]

Okay, so today I turned my DNS 323 on and here is what is says on the Status Page:

Total Drive(s): 1

Physical Disk Info

Slot Vendor Model Serial Number Size

Right Seagate ST31000528AS 6VP05Q6H 1000 G 
Left Seagate ST31000528AS 6VP0481K 1000 G 

This makes no sense at all. Additionally, both status lights on the unit are steady blue indicating that 2 disks are inserted and functioning.
I had built a raid configuration, but it is gone!

[gunrunnerjohn]

Hope you have good backup.