Then we might have a distro bug here, which is weird as I've done hundreds of
SAN installs with lucid and have had to manage the scsi_dh modules everytime.
So on your lucid system, /etc/initramfs-tools/modules should be empty
except for the commented out examples.
The next thing to check is the initram disks themselves, assuming there's no
directives in the previous config file, the presence of the scsi_dh kos in
the initrd would indicate that they were be globbed in by another
initramfs helper.
Actually...
root@nashira:~# zcat /boot/initrd.img-3.2.0-26-generic | cpio -it | grep
scsi_dh
lib/modules/3.2.0-26-generic/kernel/drivers/scsi/device_handler/scsi_dh_hp_sw.ko
lib/modules/3.2.0-26-generic/kernel/drivers/scsi/device_handler/scsi_dh_alua.ko
lib/modules/3.2.0-26-generic/kernel/drivers/scsi/device_handler/scsi_dh_rdac.ko
lib/modules/3.2.0-26-generic/kernel/drivers/scsi/device_handler/scsi_dh_emc.ko
81384 blocks
root@nashira:~# zcat /boot/initrd.img-2.6.32-41-generic | cpio -it | grep
scsi_dh
lib/modules/2.6.32-41-generic/kernel/drivers/scsi/device_handler/scsi_dh_hp_sw.ko
lib/modules/2.6.32-41-generic/kernel/drivers/scsi/device_handler/scsi_dh_alua.ko
lib/modules/2.6.32-41-generic/kernel/drivers/scsi/device_handler/scsi_dh_rdac.ko
lib/modules/2.6.32-41-generic/kernel/drivers/scsi/device_handler/scsi_dh_emc.ko
64508 blocks
OK, I'm surprised :)
In my 2.6.32 initrd I find:
root@nashira:~/2.6.32# cat conf/modules
scsi_dh_alua
which I suppose prompts my device handler to be installed. Which is driven
by 'modules' and 'modules.d' in /usr/share/initramfs-tools. So the modules
apparently have always been there, thanks to this hook script.
/usr/share/initramfs-tools/hook-functions
scsi)
copy_modules_dir kernel/drivers/scsi
for x in mptfc mptsas mptscsih mptspi zfcp; do
manual_add_modules "${x}"
done
;;
Which is how the scsi_dh_* kos got on the initramfs, but that doesn't
explain how it was loaded. That directive had to come from somewhere,
so it's either already in your /usr/share/initramfs-tools/modules|modules.d
or it's in your /etc/initramfs-tools/modules.d|modules and you missed it.
*something* has to be prompting it's inclusion.
What's the output of, as root?
grep -Rl scsi_dh /etc /usr/share/initramfs-tools/
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https://bugs.launchpad.net/bugs/1057054
Title:
poor performance after upgrade to Precise
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