On Sun, Aug 17, 2008 at 9:04 AM, Arun Khan <[EMAIL PROTECTED]> wrote: > On Friday 15 Aug 2008, Yashpal Nagar wrote: > > >> >> I experimented a bit on this and found expanding a array carefully >> does't lead to any data loss. Here is what experimented > > ....snip ... >> Now i went ahead and expanded the Array B with hpacucli, with another >> disk(146GB) into RAID0, it took 15min/per GB to expand the array as >> HP documentation states. After expanding finished, I saw both the >> disks were appearing OK into the array B. > > Do you have mission critical data on this raid array? RAID0?
Yes, it is mission critical, as critical as if data is not available, flight wouldn't take off. But it is not on RAID0, as I said "experimented" for the example shake. >> >> So in theory it appears like expanding the array with new disks >> works, with no data loss and you require a reboot into Linux. My OS >> was RHEL 4.0 ES > > > The reboot in your case was necessary since you were adding the disk to > a hardware RAID system which needed to rebuild the raid array. if I am not wrong the disk is already added into the array while the system was online, the moment you add the disk, array expansion started stating - expanding. It the scsi kernel module which required to be reloaded. > if you have spare disk partitions you can add them to an LVM w/o rebooting, > you may have to go into single user mode though. single user mode -- to add the partition into LVM? > LVM and filesystem > resize does not require a reboot. correct but, file system umount was required for ext3 on RHEL 4 Regards Yash _______________________________________________ ilugd mailinglist -- [email protected] http://frodo.hserus.net/mailman/listinfo/ilugd Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/[email protected]/
