On Thu, 5 Aug 2010 01:59:02 -0500, "Leslie Rhorer" <lrhorer@xxxxxxxxxxx> wrote: >> -----Original Message----- >> From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid- >> owner@xxxxxxxxxxxxxxx] On Behalf Of Ben Nemec >> Sent: Monday, August 02, 2010 5:18 PM >> To: linux-raid@xxxxxxxxxxxxxxx >> Subject: Replacing a drive in RAID 0 >> >> >> Hi, >> >> I have a disk in a RAID 0 array that SMART tells me is dying, but hasn't >> died yet. I have a warranty replacement on the way, and I'm wondering if >> there's any way to copy the data off the dying drive to the new drive and >> swap the RAID array to use the new one (assuming the old one lasts long >> enough to do that, of course). Can I just dd the entire drive over and >> replace the bad drive? Can the md tools do it somehow? Maybe it's >> impossible? Obviously nothing on this array is irreplaceable, but it >> would >> save me some hassle reinstalling things if I could save it. > > Well, yes, although one cannot guarantee there won't be any data > loss. Of course you will need to take the array offline, and indeed I > recommend you take it down now - or at least remount it as read-only, and > don't do any writes to it until after you have the new drive in place. > Install the new drive, and then use ddrescue to copy the contents of the > old > drive to the new. Read the man page for ddrescue carefully, and take care > not to accidentally copy the new drive to the old. Yeah, I actually did this last night and I double-checked that I was copying to and from the correct drives about half a dozen times. I used the Ubuntu Rescue Remix that includes ddrescue to do the actual copy and everything went perfectly, no lost data according to ddrescue, and the array came right up once I swapped the new drive in. Thanks again to everyone for all their help. -Ben -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
