On 26 Nov 2020, at 19:21, Gary Jennejohn <gljennjohn_at_gmail.com> wrote: > > On Thu, 26 Nov 2020 10:44:19 -0700 > Warner Losh <imp_at_bsdimp.com> wrote: ... >>> Example: >>> >>> /sbin/camcontrol standby /dev/da2 -v -t 1800 >> >> >> Perfect! I've not had to deal with sata disks that did this since the >> ataidle days. I looked in camcontrol before suggesting it, but somehow >> missed this... Glad I posted a bogus answer (sorry about that), since I >> learned something new. >> > > camcontrol unfortuantely doesn't work with my USB3 enclosures. I > suspect that the USB3-to-SATA bridge controller is doing its own thing > and camcontrol has no effect on its behavior. Not tragic for me since > I use these disks primarily for backups. But for someone using a USB > attached disk as a primary file system this behavior will definitely be > a PITA. In this case it's about ATA commands being passed though the USB bridge. Does "camcontrol identify daX" fail in your case too? I have used quite a bunch of different USB disks, mostly from WD or Seagate, and these come with varying qualities of USB-SATA bridges in them. But all of them work with "camcontrol identify". -Dimitry
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