[ This is a very late followup to a thread from April: http://mail.nl.linux.org/kernelnewbies/2006-04/msg00287.html ] Relevant context is: >> Well, Greg, the reason I was asking was because I wanted to know if the LED >> of my drive could be switched off when I umount it. In windows I noticed that >> the LED is switched off when the drive is ready to be unplugged. Is it that they >> might be removing power to the drive? Could we acheive a similar result? > >Yes, Windows is removing power to that specific port. Question: is it possible to achieve LED-off through another means? In particular: if I do 'eject -s -v /dev/sda' the LED turns off for a fraction of a second, but then comes back on. At the same time, this appears in /var/log/messages: Jun 11 09:38:25 gentoo SCSI device sda: 195371568 512-byte hdwr sectors (100030 MB) Jun 11 09:38:25 gentoo sda: Write Protect is off Jun 11 09:38:25 gentoo sda: Mode Sense: 27 00 00 00 Jun 11 09:38:25 gentoo sda: assuming drive cache: write through Jun 11 09:38:25 gentoo sda: sda1 I have no way to tell if the LED off means "I turned off but then the host SCSI found me again" or if it's just an activity-related flicker. Question: is it possible to disable the revalidation (re-recognition, whatever) so the device stays offline after 'eject -s'? OR: is it possible to send an eject command as part of scsi_remove_single_device? Setup: Gentoo, 2.6.16, Seagate ST910082 100GB USB drive. Thanks in advance, ^Ed -- Ed Santiago Toolsmith esm@xxxxxxxxxxxxxx -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
