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Hi John, I've done some tests with a SUN X4500 with zfs and "MAID" using the powerd of Solaris 10 to power down the disks which weren't access for a configured time. It's working fine... The only thing I run into was the problem that it took roundabout a minute to power on 4 disks in a zfs-pool. The problem seems to be that the powerd starts the disks sequentially. I tried to open a RFE... but until now without success. kind regards, Tobias Exner eo ipso Systeme GmbH Mertol Ozyoney schrieb: Hi ; If you want to use ZFS special ability to pool all the storage together to supply thin provisioning like functionlaty , this will work against MAID. However there is always the option to setup ZFS just like any other FS. (ie. One disk - one fs )By the way, if I am not mistaken MAID like functionality is built into Solaris. I think solaris gurus should answer this part but I think there is a command to enable MAID like functionality on sata drives. Mertol Mertol Ozyoney Storage Practice - Sales Manager Sun Microsystems, TR Istanbul TR Phone +902123352200 Mobile +905339310752 Fax +902123352222 Email [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of John Kunze Sent: Friday, June 06, 2008 7:29 PM To: zfs-discuss@opensolaris.org Subject: [zfs-discuss] ZFS conflict with MAID? My organization is considering an RFP for MAID storage and we're wondering about potential conflicts between MAID and ZFS. We want MAID's power management benefits but are concerned that what we understand to be ZFS's use of dynamic striping across devices with filesystem metadata replication and cache syncing will tend to keep disks spinning that the MAID is trying to spin down. Of course, we like ZFS's large namespace and dynamic memory pool resizing ability. Is it possible to configure ZFS to maximize the benefits of MAID? -John =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= John A. Kunze [EMAIL PROTECTED] California Digital Library Work: +1-510-987-9231 415 20th St, #406 http://dot.ucop.edu/home/jak/ Oakland, CA 94612 USA University of California =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss |
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