Re: Weird hard disk noise on shutdown (bug #7674)
From: Robert Hancock
Date: Wed Feb 21 2007 - 21:43:49 EST
Stick some printk calls in drivers/ata/libata-eh.c in ata_eh_suspend, or
turn on all the ATA debug and shutdown, the code should issue a cache
flush followed by a standbynow1 command for each disk.
I believe it runs on suspend, but we don't run that code on normal
shutdown, do we?
Tejun Heo had a patch for sd that could (optionally) trigger a START
STOP UNIT command to spin the disk down after synchronizing the cache
before shutdown, but I haven't heard anything of it lately..
Robert Hancock Saskatoon, SK, Canada
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