> -----Original Message----- > From: Tomas Ögren [mailto:st...@acc.umu.se] > Sent: 08 April 2011 11:23 > To: Karl Wagner > Cc: zfs-discuss@opensolaris.org > Subject: Re: [zfs-discuss] Read-only vdev > > On 08 April, 2011 - Karl Wagner sent me these 3,5K bytes: > > > Hi everyone. > > > > > > > > I was just wondering if there was a way to for a specific vdev in a pool > to > > be read-only? > > > > > > > > I can think of several uses for this, but would need to know if it was > > possible before thinking them through properly. > > I can't think of any, so what are your uses?
(sorry for the resend Tomas, I realised just as I pressed send that I'd sent it just to your address) One of them was simply an alternative way to do a "live CD" environment. As ZFS already does COW etc, it would avoid all the hassle you get in e.g. linux. You could have a ZFS vdev on the CD, then use a RAM disk as a second vdev. Another would be, in the case of a failing disk, set that vdev to read-only to mitigate the chances of data loss until you can replace the disk. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
