On Mon, 2004-01-12 at 22:57, Alan wrote: > On Mon, Jan 12, 2004 at 02:37:53PM -0600, Andrew Gaffney wrote: > > Ciaran McCreesh wrote: > > >On Mon, 12 Jan 2004 11:48:38 -0600 Andrew Gaffney > > ><[EMAIL PROTECTED]> wrote: > > >| I'm looking for a decent PCI IDE RAID card that can do hardware RAID 0 > > >| and/or 1 under Linux. Can anyone recommend anything? Thanks. > > > > > >If you *really* want 'IDE RAID', you have to get a 3ware. The promise > > >and highpoint drivers are just silly software hacks. > > > > > >On the other hand, in-kernel md raid is faster for IDE anyway, and > > >doesn't lock you in to a specific vendor. > > > > With the kernel software RAID, what would I need to do in order to move an > > existing system over to the RAID? I have 2 identical 120GB HD's. The second > > is just backup. I have a script that runs every night and rsync's from HD1 > > to HD2. I want to move to RAID-1 with minimal system downtime as this is a > > production server. > > If you want to move to raid 1 from a single disk there's a bit of a > procedure to go through. Hopefully others can add onto this for me, as > I've never done it myself (completely anyway). First of all, check the > howto: > http://www.tldp.org/HOWTO/Software-RAID-HOWTO-7.html#ss7.6 > It has one way to do it (redhat specific, but should give you some good > pointers that are compatible with gentoo and a liveCD :) > > Basically what you'll do is set up *one* of the two disks for raid, > setting the other as 'failed-disk' in the raidtab. Start up the raid > and it'll be running in degraded mode (1/2 disks available). At this > point you can copy data across from your "real" disk. Setup grub or > lilo so that your system will boot from /dev/md0 instead of /dev/hda1, > then change your fstab to match up. Then you can reboot (I think) and > because raid1 is redundant you can leave your "old" hard drive alone > without having to nuke it as you would if you were going to raid5 or > raid0. Once things are set up properly and working from the raid disk, > you can set the old disk to be integrated into the raid array and then > hot-add it in, let it resync (mirror the data) and you're golden. > > Disclaimer: I haven't done this, never tried it, and quite possibly > missed some very important step, so don't hold me responsible for things > totally screwing up and destroying everything :) Backup first, etc etc. > However, the gist of what is above *should* work :)
Hi, I tried the above procedure with raid on loop devices and with User mode linux and it worked... However, the performance was not so good ;-) -- [EMAIL PROTECTED] mailing list
