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Re: [Qemu-devel] [PATCH 1/5] scsi-disk: removable hard disks support STA
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 1/5] scsi-disk: removable hard disks support START/STOP |
Date: |
Mon, 23 Jul 2012 18:50:19 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120615 Thunderbird/13.0.1 |
Il 23/07/2012 18:44, Blue Swirl ha scritto:
>> > Support for START/STOP UNIT right now is limited to CD-ROMs. This is
>> > wrong,
>> > since removable hard disks (in the real world: SD card readers) also
>> > support
>> > it in pretty much the same way.
> I remember vaguely tuning a set of large SCSI hard disks
> (non-removable) so that they all didn't start immediately at the same
> time (which could have burned out the PSU) but only with START UNIT
> command. I think Linux or maybe even the BIOS started the drives
> (nicely in sequence) before accessing the drive.
Yes, all disks do start/stop. Removable disks support load and eject in
addition. I'll fix the commit message.
Paolo
- [Qemu-devel] [PATCH 0/5] virtio-scsi: support block_resize, Paolo Bonzini, 2012/07/16
- [Qemu-devel] [PATCH 1/5] scsi-disk: removable hard disks support START/STOP, Paolo Bonzini, 2012/07/16
- [Qemu-devel] [PATCH 2/5] scsi-disk: report resized disk via sense codes, Paolo Bonzini, 2012/07/16
- [Qemu-devel] [PATCH 3/5] scsi: establish precedence levels for unit attention, Paolo Bonzini, 2012/07/16
- [Qemu-devel] [PATCH 4/5] scsi: report parameter changes to HBA drivers, Paolo Bonzini, 2012/07/16
- [Qemu-devel] [PATCH 5/5] virtio-scsi: report parameter change events, Paolo Bonzini, 2012/07/16