Hello world,
I am trying to get some SAS-based blades configured using FAI. I've been
happily using FAI with bog-standard SCSI on Dell kit for a few years
now. However, I am now looking at using some HP BL460c Blades, which
have the small form factor SAS disks on them (73GB, 10K RPM). I am
booting the 2.6.18-fai-kernels for the PXE booted kernel, have an etch
chroot being successfully mounted via NFS, and am using fai 3.1.7.
I am hitting a problem I saw referenced earlier here with:
/dev/cciss/c0d0 disks:
setup_harddisks version 0.41fai
Probing disks: /dev/cciss/c0d0
Disks found:Disk /dev/cciss/c0d0: cannot get geometry
Illegal division by zero at /usr/sbin/setup_harddisks line 298.
setup_harddisks version 0.41fai
Probing disks: /dev/cciss/c0d0
Disks found:setup_harddisks did not create
/var/log/fai/current/disk_var.sh file.
Earlier reference on fai mailing list:
http://www.mail-archive.com/linux-fai@rrz.uni-koeln.de/msg04406.html
Deep within setup_harddisks is a line that works out the geometry of the
disk for formatting
$result = `sh -c "LC_ALL=C sfdisk -g -q $devdisklist"`;
Using cfdisk and fdisk I can see the geometry of the disk interactively.
Looking at the manual page for sfdisk shows the following information
for the flags "-g" and "-G":
-g or --show-geometry
List the kernel’s idea of the geometry of the indicated disk(s).
-G or --show-pt-geometry
List the geometry of the indicated disks guessed by looking at
the partition table.
And behold, using "sfdisk -G /dev/cciss/c0d0" does give a geometry:
# sfdisk -G /dev/cciss/c0d0
/dev/cciss/c0d0: 8920 cylinders, 255 heads, 63 sectors/track
So I updated the setup_harddisk in my NFS root to use the "-G" flag
(capital) to try and get the geometry read, but it seems that the
generated partitioning scheme cannot be applied by sfdisk to the SAS
disk. Here's what I get:
setup_harddisks version 0.41fai
Probing disks: /dev/cciss/c0d0
Disks found: cciss/c0d0
Using config file: /fai/disk_config/SAS-VIBRANT-1DISK-WEB
Creating partition table: LC_ALL=C sfdisk -q /dev/cciss/c0d0 <
/var/log/fai/current/partition.cciss_c0d0
Disk /dev/cciss/c0d0: cannot get geometry
Warning: The partition table looks like it was made
for C/H/S=*/255/63 (instead of 0/0/0).
For this listing I'll assume that geometry.
sfdisk: bad input
setup_harddisks version 0.41fai
Probing disks: /dev/cciss/c0d0
Disks found: cciss/c0d0
Using config file: /fai/disk_config/SAS-VIBRANT-1DISK-WEB
Creating partition table: LC_ALL=C sfdisk -q /dev/cciss/c0d0 <
/var/log/fai/current/partition.cciss_c0d0
setup_harddisks did not create /var/log/fai/current/disk_var.sh file
Examining the partition.cciss_c0d0 file:
# partition table of device: /dev/cciss/c0d0
unit: sectors
/dev/cciss/c0d0p1: start= 63, size= 8193087, Id= 83, bootable
/dev/cciss/c0d0p2: start= 8193150, size= 135106650, Id= 5
/dev/cciss/c0d0p3: start= 0, size= 0, Id= 0
/dev/cciss/c0d0p4: start= 0, size= 0, Id= 0
/dev/cciss/c0d0p5: start= 8193213, size= 2795247, Id= 82
/dev/cciss/c0d0p6: start= 10988523, size= 4851567, Id= 83
/dev/cciss/c0d0p7: start= 15840153, size= 8193087, Id= 83
/dev/cciss/c0d0p8: start= 24033303, size= 57014622, Id= 83
/dev/cciss/c0d0p9: start= 81047988, size= 62251812, Id= 83
So, in summary, sfdisk seems broken for SAS disks. Can anyone suggest a
work around I can use with FAI?
Thanks,
James
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