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 employ= er'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 t= he ATA_STANDBY_IMMEDIATE command to the drive during shutdown after sending= the ATA_FLUSHCACHE command. I've looked into the FreeBSD9.2-version of th= e 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_shutdow= n. Does anybody know if this is intentional? I'm inclined to trust newer vers= ions 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 b= een looking into it myself, but the new version of the ATA driver has chang= ed a lot from the 9.2 version and I'm having some difficulties understandin= g it. Thanks for all your help, Jay
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