On Thu, 31 Dec 2009, R.G. Keen wrote:
Given the largish aggregate monetary value to RAIDZ builders of sidestepping the doubled-cost of raid specialized drives, it occurs to me that having a special set of actions for desktop-ish drives might be a good idea. Something like a fix-the-failed repair mode which pulls all recoverable data off the purportedly failing drive and onto a new spare to avoid a monster resilvering and the associated vulnerable time to a second or third failure.
The problem is that a "desktop-ish drive" may single-mindedly focus on reading the bad data while otherwise responding as if it is alive. So everything just waits a long time while the OS sends new requests to the drive (which are recieved) but the OS does not get the requested data back. To make matters worse, the OS might send another request for the same data, the drive gives up on the last request, and then proceeds with the new request for the same bad data.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
