on 15:26 Mon 07 Feb, Ross Walker (rswwalker at gmail.com) wrote: > On Mon, Feb 7, 2011 at 1:56 PM, Jason Brown > <jason.brown at millbrookprinting.com> wrote: > > I am currently going through the process of installing/configuring an > > iSCSI target and cannot find a good write up on how to prepare the disks > > on the server. I would like to mirror the two disks and present them to > > the client. Mirroring isn't the question, its how I go about it is the > > problem. When I partitioned the two drives and mirrored them together, > > then presented them to the client, it showed to the client as a disk out > > no partion on it. Should I partition the drive again and then lay the > > file system down on top of that? Or should I delete the partitions on > > the target server and just have sda and sdb mirrored, then when the > > client attaches the disk, then partion it (/dev/sdc1) and write the file > > system. > > Whatever you export, the whole disk, partition or logical volume, the > initiator will see as a whole disk. > > So if you mirror sdaX and sdbX and export md0 the initiator will see a > disk the size and contents of sdaX/sdbX. > > Just create the filesystem on the disk on the initiator and use it there. > > REMEMBER: iSCSI isn't a way for multiple initiators to share the same > disk (though they can using specialized clustering file systems), it > is a way for multiple initiators to share the same disk subsystem. *OR* as a special case, if access is *only* read-only (or read-only to all but one initiator). > You can't access the file system from both the target-side and > initiator-side at once or it will corrupt the file system. If that's > what you want then you want NFS or Samba and not iSCSI. Right, or other network-aware filesystem (andrew, coda, gluster), none of which are particularly widely used. http://en.wikipedia.org/wiki/List_of_file_systems#Distributed_file_systems -- Dr. Ed Morbius Chief Scientist When you need power Krell Power Systems Unlimited Go to Krell!