Messages in this thread | | | From | Andrey Borzenkov <> | Subject | CDROMEJECT (or START_STOP(2)) completely disables USB flash stick | Date | Thu, 6 Jul 2006 13:10:04 +0400 |
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While working on some HAL issues I hit some not clear - to me at least - behavior. I was testing HAL Eject method that under Linux effectively calls 'eject /dev/block'. Now for USB stick - at least, that I have, this results in "ejecting medium" without apparently any way to get it back (the only way is to replug stick).
UEVENT[1152175788.114199] remove@/block/sda/sda1 ACTION=remove DEVPATH=/block/sda/sda1 SUBSYSTEM=block SEQNUM=1332 MINOR=1 MAJOR=8 PHYSDEVPATH=/devices/pci0000:00/0000:00:02.0/usb1/1-1/1-1:1.0/host1/target1:0:0/1:0:0:0 PHYSDEVBUS=scsi PHYSDEVDRIVER=sd
In this state I do see device:
{pts/0}% sudo sdparm -a /dev/sda /dev/sda: 128MB 2.00 {pts/0}% cat /proc/scsi/scsi Attached devices: Host: scsi1 Channel: 00 Id: 00 Lun: 00 Vendor: Model: 128MB Rev: 2.00 Type: Direct-Access ANSI SCSI revision: 02
but any attempt to get partition back results in
{pts/0}% LC_ALL=C sudo blockdev --rereadpt /dev/sda /dev/sda: No medium found
I tried 'sdparm -C start' without much success as well:
{pts/0}% LC_ALL=C sudo sdparm -v -C start /dev/sda /dev/sda: 128MB 2.00 Start stop unit command: 1b 00 00 00 01 00 {pts/0}% LC_ALL=C sudo blockdev --rereadpt /dev/sda /dev/sda: No medium found
Well, I just try to understand if this is a expected (and reasonable) behaviour or a bug in hardware or possibly software?
Thank you
- -andrey
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