> PATA disks are difficult. Similar problems for SATA and SCSI ... > There is a very slight chance of damaging the interface electronics, > and motor driver electronics. As below, that can be fixed ... > There is also a chance of data loss, as it is difficult to guarantee that > no write-behind cache is in operation. If under RAID, use "raidsetfaulty" first, or otherwise make it quiescent. > Finally, the operating system has to be able to disable an IDE device > and redetect it, There is code to do that, e.g. for laptop selectbays. > including partition tables, etc That works just fine, so long as no partition is in use, which it should not be. > - somewhat of a grey area in the Linux kernel from my reading > of the kernel sources. If that's changed, please let me know! I re-partition disks "on the fly" fairly frequently. I use RAID1 for all data, so I turn swapping off on the required disc, the "raidsetfaulty" and "raidhotremove" all the data partitions, then write the new partition tables which the kernels sees (check with /proc/partitions), then raidhotadd the partitions, mkswap and swapon, then repeat on the other disk, and bingo -- repartitioned without needing a reboot. > There are cheap($30) hotswap caddies with a power switch which removes > power from the drive and places the interface bus in Hi-Z state, but > this still leaves the caching and operating system disable/redetect > issues. > > Cheers, glen. > _______________________________________________ > linux-lvm mailing list > linux-lvm@redhat.com > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
