Date: Tue, 19 Nov 2013 19:20:18 +0000 From: Jay Elliott <jelliott@juniper.net> To: "freebsd-drivers@freebsd.org" <freebsd-drivers@freebsd.org> Subject: usage of the standby immediate command in the ATA driver Message-ID: <c9411c828de94caf9cc3a4c6f4461a1c@BY2PR05MB190.namprd05.prod.outlook.com>
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Hi freebsd-drivers, I'm looking into some issues regarding filesystem corruption with my employer's FreeBSD6-based kernel. We've consulted with the vendor that supplies our SSDs, and they've told us to make sure that our ATA driver is sending the ATA_STANDBY_IMMEDIATE command to the drive during shutdown after sending the ATA_FLUSHCACHE command. I've looked into the FreeBSD9.2-version of the ata driver to see if this behavior has been changed, but as far as I can tell it also does not send the ATA_STANDBY_IMMEDATE command from ad_shutdown. Does anybody know if this is intentional? I'm inclined to trust newer versions of FreeBSD more than my hardware vendor, but I want to make sure this isn't a mistake. Also, does anybody know if this behavior has changed in FreeBSD 10? I've been looking into it myself, but the new version of the ATA driver has changed a lot from the 9.2 version and I'm having some difficulties understanding it. Thanks for all your help, Jayhelp
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