If anybody does know of any source to the secure erase/reformatters, I'll happily volunteer to do the port and then maintain it.
I'm currently in talks with several SSD and driver chip hardware peeps with regard getting datasheets for some SSD products etc. for the purpose of better support under the OI/Solaris driver model but these things can take a while to obtain, so if anybody knows of existing open source versions I'll jump on it. Thanks, Deano From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-boun...@opensolaris.org] On Behalf Of Garrett D'Amore Sent: 23 December 2010 15:22 To: Erik Trimble; Christopher George Cc: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Looking for 3.5" SSD for ZIL We should get the reformatter(s) ported to illumos/solaris, if source is available. Something to consider. - Garrett -----Original Message----- From: zfs-discuss-boun...@opensolaris.org on behalf of Erik Trimble Sent: Wed 12/22/2010 10:36 PM To: Christopher George Cc: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] Looking for 3.5" SSD for ZIL On 12/22/2010 7:05 AM, Christopher George wrote: >> I'm not sure if TRIM will work with ZFS. > Neither ZFS nor the ZIL code in particular support TRIM. > >> I was concerned that with trim support the SSD life and >> write throughput will get affected. > Your concerns about sustainable write performance (IOPS) > for a Flash based SSD are valid, the resulting degradation > will vary depending on the controller used. > > Best regards, > > Christopher George > Founder/CTO > www.ddrdrive.com Christopher is correct, in that SSDs will suffer from (non-trivial) performance degredation after they've exhausted their free list, and haven't been told to reclaim emptied space. True battery-backed DRAM is the only permanent solution currently available which never runs into this problem. Even TRIM-supported SSDs eventually need reconditioning. However, this *can* be overcome by frequently re-formatting the SSD (not the Solaris format, a low-level format using a vendor-supplied utility). It's generally a simple thing, but requires pulling the SSD from the server, connecting it to either a Linux or Windows box, running the reformatter, then replacing the SSD. Which, is a PITA. But, still a bit cheaper than buying a DDRdrive. <wink> -- Erik Trimble Java System Support Mailstop: usca22-123 Phone: x17195 Santa Clara, CA Timezone: US/Pacific (GMT-0800) _______________________________________________ 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
