Error On Raid, Not Sure What To Do

[oxygen8]

read the last post
http://forums.buffalotech.com/index.php?topic=25082.0

[Ringfinger]

Okay, thanks!  I would assume if there are mirrors of each other in the same enclosure they both have had the same cycles.  Safest to replace both and move on is my guess.

[Ringfinger]

Just to be safe.  That's $120 for peace of mind, eh?

[davo]

Unless there is an error on the other disk i wouldn't replace it, just make sure you have a backup in place.

[Ringfinger]

I get you.  So, one bad sector on the one drive is really not that bad anyhow?  I am replacing it but just asking. 

What would constitute a good back-up?  Buy a USB drive that plugs into the NAS and backs up weekly?  Just want to make sure I employ the right strategy.

[Ringfinger]

Like something like this that I can plug into my NAS and have it back-up weekly to it?

https://www.newegg.com/Product/Product.aspx?Item=9SIA2F83426457&cm_re=usb_backup-_-22-165-440-_-Product

[oxygen8]

You need a good cooling
I prefer this casing:
https://www.wdc.com/de-de/products/wd-recertified/wd-elements-desktop.html

with bad cooling you will have this:




from
http://forum.nas-hilfe.de/festplatten-und-ssd-laufwerke/was-passiert-wenn-eine-festplatte-ueberhitzt-t2018.html

[Ringfinger]

I get you.  But conceptually that is what I need to do to have a good back-up?

[davo]

I get you.  But conceptually that is what I need to do to have a good back-up?

Correct.

[Ringfinger]

Thank you so much.  Rebuilding the array now on the new drive.

[Ringfinger]

Disk 2 just gave me the same error.  Time to replace that one now.

[Coys55]

create a backup immediately!

Exactly. RAID is not a backup and it is always possible that for any one of a catalogue of reasons (e.g. virus, RAID controller corruption, both drives failing, theft, fire, stupidity - need I go on?) you can lose the data. ALWAYS take regular backups and store the drive in a safe place, preferably offsite.

And most importantly for now, take a backup before attempting to replace the failed drive, even if it's just your most important data to a desktop or laptop.

Edit: Oops, I've just noticed that the original drive failure was in May so my warnings were a I'm a bit late for that one. My backup comments are no less relevant now though...