Michael, Probably - I went with "ghost" because I had a boot floppy handy. The main thing is to get the MBR from that first drive - without it, you're out of luck. In software RAID, the MBR is only written to the first drive, which really doesn't make sense. I would think that if you had the first drive fail, you should be able to boot off the second one - IMHO. Mike. On Fri, 2004-08-13 at 18:10, Michael Mansour wrote: > Hi Michael, > > Many thanks for the below, I'll try this process > tonight. > > With the "Ghost", could I simply boot from a Live > Rescue CD and use something like: > > # dd if=/dev/hdg of=/dev/hde > > where /dev/hde would be the new blank drive? > > Michael. > > --- "Michael E. Webster" <mwebster@xxxxxxxxxxxxxxx> > wrote: > > Michael, > > > > Whaddaya know.. I just happen to have a recipe for > > doing this. > > I went through a similar problem about two months > > ago. > > Just substitute /dev/hde and /def/hdg where > > applicable. > > > > > > Copy the MBR to /dev/hdc (done before procedure) > > > > prompt# grub > > > > Grub> device (hd0) /dev/hdc > > > > Grub> root (hd0,0) > > > > Grub> setup (hd0) > > > > > > Make sure that we have the partition table for all > > drives backed up > > (done before) > > > > prompt# sfdisk -d /dev/hda > > > /raidinfo/partitions.hda > > > > prompt# sfdisk -d /dev/hdc > > > /raidinfo/partitions.hdc > > > > prompt# more /proc/mdstat > /raidinfo/mdstat.md > > > > > > Estimated time: zero minutes > > > > > > Shutdown the box > > > > Remove /dev/hda and label as â??hda badâ?? > > > > Boot box to make sure it boots > > > > Shutdown server and place new blank drive in ide0 > > (new hda) > > > > Estimated time: ten minutes > > > > > > Ghost ide1 (hdc) to ide0 (hda) > > > > Do â??Boot Imageâ?? copy > > > > Estimated time: a little more than an hour > > > > > > Remove ide1 (original hdc) and label as â??hdc > > goodâ?? > > > > Power on to make sure ide0 (new hda) boots > > > > Shutdown and place new blank drive in ide1 (new hdc) > > > > Power on to make sure it boots > > > > Shutdown > > > > Estimated time: fifteen minutes > > > > > > Power on and boot > > > > Copy the MBR to hdc > > > > prompt# grub > > > > Grub> device (hd0) /dev/hda > > > > Grub> root (hd0,0) > > > > > > > > Hope this helps, > > Mike. > > > > > > > > > > On Fri, 2004-08-13 at 17:51, Michael Mansour wrote: > > > Hi, > > > > > > I have a server with a 2 disk Linux Software RAID > > 1 > > > setup (two 80Gb disks). The first device is > > /dev/hde > > > and the second is /dev/hdg. > > > > > > The /dev/hde device is ready to fail, as it > > produces > > > various SMART errors using smartctl and fails on a > > > self-test with: > > > > > > [root@gazelle root]# smartctl -l selftest /dev/hde > > > smartctl version 5.30 Copyright (C) 2002-4 Bruce > > Allen > > > Home page is http://smartmontools.sourceforge.net/ > > > > > > === START OF READ SMART DATA SECTION === > > > SMART Self-test log structure revision number 1 > > > Num Test_Description Status > > > Remaining LifeTime(hours) LBA_of_first_error > > > # 1 Short offline Completed: read failure > > > > > 90% 34 0x0463c0ee > > > # 2 Short offline Completed: read failure > > > > > 90% 1087 0x0425290c > > > # 3 Extended offline Completed: read failure > > > > > 90% 1072 0x0425290c > > > # 4 Short offline Completed: read failure > > > > > 90% 1072 0x0425290c > > > # 5 Short offline Completed: read failure > > > > > 90% 1071 0x0425290c > > > > > > The server is running Fedora Core 1. > > > > > > I have the new 80Gb disk and wish to replace > > /dev/hde > > > device with the new disk, how do I do this? > > > > > > The following is how I have the mirror setup: > > > > > > # fdisk -l /dev/hde > > > > > > Disk /dev/hde: 80.0 GB, 80026361856 bytes > > > 255 heads, 63 sectors/track, 9729 cylinders > > > Units = cylinders of 16065 * 512 = 8225280 bytes > > > > > > Device Boot Start End Blocks Id > > > System > > > /dev/hde1 * 1 395 3172806 b > > > Win95 FAT32 > > > /dev/hde2 396 408 104422+ fd > > > Linux raid autodetect > > > /dev/hde3 409 1070 5317515 fd > > > Linux raid autodetect > > > /dev/hde4 1071 9729 69553417+ f > > > Win95 Ext'd (LBA) > > > /dev/hde5 1071 1331 2096451 fd > > > Linux raid autodetect > > > /dev/hde6 1332 1585 2040223+ fd > > > Linux raid autodetect > > > /dev/hde7 1586 1716 1052226 fd > > > Linux raid autodetect > > > /dev/hde8 1717 4327 20972826 fd > > > Linux raid autodetect > > > /dev/hde9 4328 9729 43391533+ fd > > > Linux raid autodetect > > > > > > with /dev/hdg being exactly like above. > > > > > > As soon as I pull out the /dev/hde device, the > > server > > > won't boot (as grub only resides on /dev/hde), so > > I > > > also installed grub on /dev/hdg to overcome that > > > problem. But now I'm wondering what I must do to > > pull > > > out /dev/hde and replace it with the new drive > > (which > > > doesn't have any partitioning setup) and then > > force > > > Linux to resync the data on /dev/hdg to the new > > > /dev/hde? > > > > > > Is there some way I have to fail the /dev/hde > > drive, > > > replace it then put it back on-line? First time > > I've > > > done this with Software RAID so I'm not sure. > > > > > > Any advice is appreciated. > > > > > > Michael. > > > > > > > > > Find local movie times and trailers on Yahoo! > > Movies. > > > http://au.movies.yahoo.com > > > > > > > > > -- > > fedora-list mailing list > > fedora-list@xxxxxxxxxx > > To unsubscribe: > > http://www.redhat.com/mailman/listinfo/fedora-list > > > === message truncated === > > Find local movie times and trailers on Yahoo! Movies. > http://au.movies.yahoo.com >
