bad disk ?

[bart357]

It looks as if I have a bad disk and the server is listed as degraded.
I am away from the server and I will have to try and fix it next week.
I have shut down the server but one thing I did notice was the disk is missing from the disk management page.
I would have thought that the disk would remain on that page with the status listed as something other as online.

[raulfg3]

Hard Disk Fails are not equal ones to others, your disk can be totaly damaged or damaged only the electronics part, so it can't comunicate/respond to commands, in this cases, the disk can't be listed on the detected Disk page.

first do a backup of yourr confg, and print disk webgui page to have a piece of paper with your working serial numbers disk.

second , do a totally shutdown , wait 2 minutes , and power-on your NAS.

2 things can happend:

1- your disk can be detected this time, well ok, but do not be excesive happy, once your NAS is online, pass a S.M.A.R.T test and revise values, post the output so others user can help you to detrmine if your disk is still valid.

2- Your disk do not be detected, this is the easy case, because you only need to identify what is the dammaged disk ( use serial number to identify) and replace it.

In both cases you need to resilver your pool, but be patient, do not resilver case 1 until be sure that disk is in good state or you can damage your pool in the resilver process ( Disk stress intensive).

[bart357]

I have a few questions.
With ZFS can you mix drive speeds?
I have Seagate green drives 5400 rpm. Can you replace a failed disk with a 7200 rpm drive as long as it is the same size or larger? Has anyone tried the WD Red drives? Are they any good?

Anyway I returned to my server and I followed the instructions for drive replacement located at

http://wiki.nas4free.org/doku.php?id=faq:0149 but I had a few issues.

I Offline the bad disk in WebGUI Tab> Disks|ZFS|Pools|Tools then
From WebGUI Tab> Advanced|Execute command
I entered the command zpool replace tank ada2

nothing happened what is wrong with that command?
I Online the disk and issued the command zpool replace tank ada2 and again nothing happened.
What is wrong with the command or is there an issue with executing through the GUI?

Anyway I used Disks|ZFS|Pools|Tools and used the replace command from there and the re-silver process started.

I also had to go to Disks|Management and use clear config and import disks so the new drive would properly be displayed on that page.

Everything looks fine and in working order and I think the disk has been properly replaced.

One last question, the bad drive is still under warranty and I was going to try and RMA it but I cant get into the drive to blank the disk. The disk just sits there and clicks. The disk has personal stuff on it and I was wondering how much info someone could get off one raidz1 disk? I am paranoid about identity theft and well its all my personal stuff.

Take care.

[raulfg3]

Last question: You can put in your PC And format it, not 100% safe, but usefull in most cases.

[ku-gew]

You can even mix HDDs and SSDs, different speeds won't hurt much.