On 01/24/13 16:49, Michael Orlitzky wrote: > On 01/24/13 05:02, Michael Haubenwallner wrote: >> >> I've recently upgraded some server from kernel-2.6.28 to kernel-3.5.7 and >> encountered that the root-device was renamed from /dev/cciss/c0d0p1 to >> /dev/sda1 due to some kernel driver change (took me a while to find out). >> I'm not using genkernel or any initramfs, nor do I have separate /usr. >> >> The only way I've found to keep the system bootable with both kernels >> (for the upgrade process until the new kernel config was good enough) >> was to replace /dev/cciss/c0d0p1 by /dev/root in /etc/fstab. >> >> How would this be done when there is no /dev/root any more? > > These are the Compaq SmartArray controllers (usually found in HP > Proliants). They used to have their own block driver, but these days > they're just grouped with the rest of the SCSI drives.
Yep, this is a HP DL380 G6, and lspci says: 04:00.0 RAID bus controller: Hewlett-Packard Company Smart Array G6 controllers (rev 01) > The old driver: > > Block Devices -> BLK_CPQ_CISS_DA > > The new one is under, > > SCSI device support -> SCSI low-level drivers -> SCSI_HPSA > The HPSA driver does *not* work on older Proliants, so I can only assume > that HPSA is receiving active maintenance while the old block driver is > not. Nevertheless, if the block driver worked for you in an old kernel, > you could simply disable HPSA on the new one. Well, I'm pretty sure to have started with BLK_CPQ_CISS_DA=y in the new kernel config, but this driver doesn't seem to feel responsible for that controller any more - or what else could have make me wonder where /dev/cciss/* has gone? Finally I went along [1] to identify SCSI_HPSA as the correct driver. [1] http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/ch08s02.html > When the time comes that you need to boot two newish kernels, you can > re-enable HPSA and update fstab to use the new name. So this didn't work out IIRC - but I won't retest that now. For the curious: $ cat /sys/bus/pci/devices/0000\:04\:00.0/vendor 0x103c $ cat /sys/bus/pci/devices/0000\:04\:00.0/device 0x323a /haubi/
