Date: Fri, 15 Feb 2013 17:02:52 +0800 From: jackson wang <jackson4015@gmail.com> To: freebsd-scsi@freebsd.org Subject: Link rate problem of SAS HDD Message-ID: <CAHPbiTZOYhzUQFMJnxVQY6woy27JACDcYgnofCZpmr8xw8yZjg@mail.gmail.com>
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Hello,All. I have a SAS HDD,have some demands as following: 1.Use SCSI command to get the supported link rates,ex:1.5? 3.0? or 6.0 Gb/s; 2.Get current working link rate with SCSI CMD; 3.Need to downgrade 6.0gb/s to 3.0gb/s with SCSI CMD because some RAID card had bugs, so speed negotiation sometimes failed; I know many RAID cards have management tool:CLI,which could make it, but not all system install that tool, so using SCSI command is the only option. PLS help to give some advices. Thx!
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