To read the data from the recording harddisks of some autonomous
recording stations we'd like to use a Linux PC. The disks having
an IDE interface (one disk per data recorder), we are now considering
to use a hardware converter to make them look like SCSI disks so
we can put up more than one disk in a chain and process the data
simultaneously. Using two SCSI hostadapters, it would thus be
possible to access 14 disks at the same time, more than IDE
interfaces would allow - and without the geometry hassle, we hope.
What do you think about this idea?
How reliable are those converter beasts?
How do they behave if there is no disk plugged in?
How do they define the disk's geometry - will it work with older
disks also?
Would it be enough to unload the SCSI driver module to flush the
kernel's buffers and afterwards re-load it? What if the SCSI
module would serve the system harddisk, too? Should we better use
IDE for basic system functionality so SCSI is only needed on
request? (Else: how to re-scan a whole bus or even several busses?)
Any hint is welcome, as we're still in the design phase (for the
data retrieving machine, that is, the data logger is already there).
Steffen
--
Steffen Grunewald * GeoForschungsZentrum Potsdam * Projektbereich 2.2
Telegrafenberg E3 * D-14473 Potsdam * Germany / Duitsland / Allemagne
office: steffen(at)gfz-potsdam.de * home: steffen.grunewald(at)gmx.de
Swim nude. Sharks hate to peel their food.
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