But don't copy the partition map at the beginning of the drive otherwise you'll end up with 1.5tb drives that have a 750gb partition. Someone confirm but I believe that's the first 512 bytes when copying with dd. Jeff On Mon, May 11, 2009 at 12:11 AM, Redeeman <redeeman@xxxxxxxxxxx> wrote: > > On Mon, 2009-05-11 at 01:00 +0200, Rainer Fuegenstein wrote: > > hi, > > > > I'm currently using a 4*750GB SATA RAID-5 under centos 5.2 (mdadm > > v2.6.4, kernel 2.6.18-128.1.6.el5) which I need to exend by replacing > > the 750GB disks with 1.5TB ones. > > > > since the mainboard has only 4 SATA ports, I need to replace one disk > > after the other. I came up with the following plan: > > > > 1) fail first disk > > mdadm /dev/md0 -f /dev/sda1 > > > > 2) remove first disk > > mdadm /dev/md0 -r /dev/sda1 > > > > 3) shutdown the server, unplug 750GB sda drive, plug in 1.5TB drive > > If you are going to do downtime anyway, i would suggest you just down > the box, and then copy the data with dd, that way you should probably be > able to avoid the costly resync, plus temporary loss of redundancy > > > 4) create a linux raid autodetect partition on sda which covers the > > whole 1.5TB > > > > 5) add new device to the raid5 and wait until resync has finished > > mdadm /dev/md0 -a /dev/sda1 > > > > ... repeat steps 1 tp 5 for sdb to sdd > > > > 6) grow the raid > > mdadm --grow /dev/md0 > > > > 7) resize the xfs filesystem > > xfs_growfs /md0-mount-point > > > > is this the proper way to do it, are there any issues I should know > > about ? > > > > > thnx in advance. > > > > -- > > 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 > > -- > 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 -- 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
