> 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.
This procedure is more commonly known as a "Secure Erase". And it will return a Flash based SSD to it's original or "new" performance. But as demonstrated in my presentation comparing Flash to DRAM based SSDs for ZIL accelerator applicability, the most dramatic write IOPS degradation occurs in less than 10 minutes of sustained use. For reference: http://www.ddrdrive.com/zil_accelerator.pdf So for the tested devices (OCZ Vertex 2 EX / Vertex 2 Pro) to come close to matching the vendor promised random write IOPS, one would have to remove the log device from the pool and Secure Erase after every ~10 minutes of sustained ZIL use. Would having to perform a Secure Erase every hour, day, or even week really be the most cost effective use of an administrators time? Best regards, Christopher George Founder/CTO www.ddrdrive.com -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
