Messages in this thread | | | Date | Wed, 13 Aug 2008 16:38:39 -0400 (EDT) | From | Alan Stern <> | Subject | RE: [linux-pm] Power management for SCSI |
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On Wed, 13 Aug 2008, Leisner, Martin wrote:
> Regarding these scsi suspend patches, there's a general > problem to drop power on disk devices on a running system. > I discussed it in: > > http://www.gossamer-threads.com/lists/linux/kernel/811598
There's a much worse problem which that thread completely ignored:
When you turn off power to a disk device, to the system it looks like a hot-unplug event. Any mounted filesystems or memory mappings on that disk will be lost.
Alan Stern
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