I would like to implement real hotswapping support with IDE drives in the
following setup:
Asus A7V motherboard (has 2 standard IDE bus, and 2 additional bus)
cheap/standard hotswap IDE hardware
00:04.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo] (rev 10)
00:11.0 Unknown mass storage controller: Promise Technology, Inc.: Unknown device 0d30 (rev 02)
Simply removing and replacing the disk drive will cause hangs in normal
operation.
I have noticed, by creating a simple boot floppy with IDE modules
(ide_mod, ide_disk, ide_probe_mod), that if you remove ide_probe_mod,
replace the disk, and reinsert ide_probe_mod, the disk is detected
correctly (geometry, size, etc).
My questions:
- assuming one-disk-per-bus (ie 4 disks in the above IDE+promise
configuration), is it at all feasible ? (ie IDE masters only)
- should I expect the IDE chips to hardware-fail after a few
inserts/removes ?
- would modifying drivers/ide/ide_probe.c to add a new function
drop_bus(bus_id), scan_bus(bus_id) be a good idea, along with
a /proc interface from ide_probe.c or another to be developped
module ?
- is there already work in progress in the topic ? or a simpler
way to do the above ?
The initial case is to assume that inserting/removing must be done in a
software-controlled way.
The next step will be to see if the IDE subsystem can detect a failing
drive / removed drive without warning. Reinsertion could be done by
polling every 30 seconds or manual user intervention.
Thank you for any comments.
-
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This archive was generated by hypermail 2b29 : Fri May 31 2002 - 22:00:22 EST