Reattach/redetect allways connected umass device - is it possible
scottl at samsco.org
Mon Mar 28 07:04:34 PST 2005
Poul-Henning Kamp wrote:
> In message <20050328134856.GF14532 at cicely12.cicely.de>, Bernd Walter writes:
>>>Driver support for this is not really meaterialized and therefore
>>>the model now is that when the media is ejected the geom device
>>>is removed and a new one created right away, even if a new media
>>>is not inserted right away.
>>Do you get eject notifications from any device type?
> Right now I belive floppy disks DTRT.
>>One of my problems is that it is possible with SCSI MO drives to
>>eject the media, reinsert a new one and errously continue to work
>>with the old GEOM layout.
>>I already trashed the data on one media by forgetting to trigger
>>a reprobe - since then I use a mount script.
> Well, I have no idea how to pull the information out of the CAM/SCSI
> code, but I'm sure there is _some_ way it can be done.
So are you saying that an async notification mechanism needs to be
invented for SCSI, or that all SCSI users should be required to use
SES or SAFTE enclosures for all SCSI devices, or that we should be like
Windows and constantly poll the devices?
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