Date: Thu, 10 Nov 2016 16:35:46 +0000 From: Mike Clarke <jmc-freebsd2@milibyte.co.uk> To: freebsd-questions@freebsd.org Subject: Re: SSD drive appears to have been "downgraded" from SATA 2 to SATA 1 Message-ID: <20161110163546.7b9d4105@curlew.lan> In-Reply-To: <20161109222002.7995b1c9@curlew.lan> References: <20161109222002.7995b1c9@curlew.lan>
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On Wed, 9 Nov 2016 22:20:02 +0000 Mike Clarke <jmc-freebsd2@milibyte.co.uk> wrote: > Could there be any way that the system could at some time have forced > the drive down to SATA 1, in which case how do I revert it? Or is it > more likely that I have a faulty SSD drive? I've now managed to establish that the drive had been functioning in SATA 2 300MB/s mode until yesterday when I re-partitioned it to overcome a problem which had been preventing me from booting from it. Copies of /var/run/dmesg.boot from my backups show that the drive was performing as SATA 2 300MB/s until yesterday. Before re-partitioning the drive I used camcontrol to clear its contents and mark all cells empty with: camcontrol security ada0 -s buhbyesweetdata -e buhbyesweetdata I'm now only seeing SATA2 150MB/s for that drive. curlew:/home/mike% camcontrol identify ada0 | head -2 pass1: <SanDisk SD6SB2M128G1022I X210400> ATA8-ACS SATA 3.x device pass1: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 512bytes) It looks as though the camcontrol security command has somehow also caused the drive to drop down to SATA 1 mode. Is there any way I can use camcontrol (or any other utility) to restore this? -- Mike Clarke
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