[Beowulf] moving of Linux HDD to other node: udev problem at boot

Reuti reuti at staff.uni-marburg.de
Wed Aug 19 12:07:19 PDT 2009

Am 19.08.2009 um 19:12 schrieb Mikhail Kuzminsky:

> As it was discussed here, there are NUMA problems w/Nehalem on a  
> set of Linux distributions/kernels. I was informed that may be old  
> OpenSuSE 10.3 default kernel (2.6.22) works w/Nehalem OK in the  
> sense of NUMA, i.e. gives right /sys/devices/system/node content.
> I moved Western Digital SATA HDD w/SuSE 10.3 installed (on dual  
> Barcelona server) to dual Nehalem server (master HDD on Nehalem  
> server) with Supermicro X8DTi mobo.
> But loading of SuSE 10.3 on Nehalem server was not successful. Grub  
> loader (which menu.lst configuration uses "by-id" identification of  
> disk partitions) works OK. But linux kernel booting didn't finish  
> successfully: /boot/04-udev.sh script (which task is udev  
> initialization) - I think, it's from initrd content -  do not see  
> root partition (1st partition on HDD) !
> At the boot I see the messages
> ....
> SCSI subsystem initialized
> ACPI Exception (processor_core_0787): Processor device isn't present
> ....
> <a set of messages about usb>
> ...
> Trying manual resume from /dev/sda2                      /* it's  
> swap partition*/
> resume device /dev/sda2 not found (ignoring)

There might be an entry "append resume=..." either in lilo.conf or  
grub's menu.lst

> ...
> Waiting for device /dev/disk/by-id/scsi-SATA-WDC_WD<name_of_disk>- 
> part1 ... /* echo from udev.sh */

Maybe the disk id is different form the one recored in /etc/fstab.  
What about using plain /dev/sda1 or alike, or mounting by volume label?

-- Reuti

> and then the proposal to try again. After finish of this script I  
> don't see any HDDs in /dev.
> BIOS setting for this SATA device is "enhanced". "compatible" mode  
> gives the same result.
> What may be the source of the problem ? May be HDD driver used by  
> initrd ?
> Mikhail Kuzminsky
> Computer Assistance to Chemical Research Center
> Zelinsky Institute of Organic Chemistry RAS
> Moscow
> PS.  If I see (after finish of udev.sh script) the content of /sys  
> - it's right in NUMA sense, i.e.
> /sys/devices/system/node contains normal node0 and node1.
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