The behaviour you're seeing is somewhat different to what I've seen.
If the jaz had spun down then trying to execute a command on it would fail
the first time but the drive would spin up. Executing the command a second
time would then work OK.
I have an idea the different behaviour may be due to the way the adaptec
controllers handle drive errors internally, automatically checking error
status rather than letting the Linux drivers do it.
When the drive spins down it will report itself not ready even though really
it has just gone to sleep. It could be that the Adaptec controller is seeing
it not ready and generates a fatal error to the driver which gives up rather
than trying to spin it up which happens somewhere in the linux scsi disk
code.
Perhaps someone who knows the Adaptec drive code could comment on this.
You can try and get it to spin up using the following program which can be
used to set the spin down time of the jaz or disable spin down all together.
Richard
begin 644 jazsleep.tar.gz
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'_%*Y`%```$./
`
end
-- Richard Waltham | Work: richard@digtalinterface.demon.co.uk At home in | Home: dormouse@farsrobt.demon.co.uk Southampton UK | Compuserve 100421.1276