I have a system(s) which is failing to fsck /dev/mapper/<wwn> devices during boot time. The dev-mapper devices are not created from the time dmsetup is run in rc.sysinit until the device fsck is run (next block). The only device in /dev/mapper is /dev/mapper/control, none of the <wwn> devices exist before fsck attempts to run. I have put in a "sleep 10" in between the two code blocks and this has worked on one system and not others. >From our research our understanding is that there is a race condition somewhere in udev and dmsetup. Does anyone know if there is a fix for this issue or have encountered anything similar? Is there anything I can pass to dmsetup to ensure that devices are created before it returns? This appears to be specific to the latest generation HP servers for some reason (faster procs?). Information about the system and lsmod and ls -al /dev/mapper/ commands inserted in rc.sysinit below. OS: RHAS 4 Kernel: 2.6.9-42.Elsmp and 2.6.9-55.Elsmp Hardware: HP DL380G5 2x proc (latest multi-core) external disk: 3PARdata HBA: Qlogic 2460 PCI-x HBA driver: 8.01.04-d7 Tue Jun 19 17:12:09 EDT 2007 >> ls -al /dev/mapper/* is run here crw------- 1 root root 10, 63 Jun 19 13:11 /dev/mapper/control >> lsmod is run here - note dm_round_robin is not loaded Module Size Used by dm_mirror 32465 0 dm_multipath 21841 0 button 9057 0 battery 11209 0 ac 6729 0 hw_random 7137 0 bnx2 147253 0 qla2400 201025 0 ext3 137809 2 jbd 69104 1 ext3 dm_mod 68097 2 dm_mirror,dm_multipath ata_piix 14405 0 libata 78473 1 ata_piix qla2300 127425 0 qla2322 137537 0 cciss 69809 3 qla2xxx 183201 3 qla2400,qla2300,qla2322 scsi_transport_fc 11841 1 qla2xxx sd_mod 19393 0 scsi_mod 141457 5 libata,cciss,qla2xxx,scsi_transport_fc,sd_mod Tue Jun 19 17:12:19 EDT 2007 >> ls -al /dev/mapper/* run again 10 seconds later brw-rw---- 1 root disk 253, 0 Jun 19 17:12 /dev/mapper/350002ac0000c03fd brw-rw---- 1 root disk 253, 1 Jun 19 17:12 /dev/mapper/350002ac0000c03fd1 crw------- 1 root root 10, 63 Jun 19 13:11 /dev/mapper/control >> dm_round_robin is loaded Module Size Used by dm_round_robin 4929 1 dm_mirror 32465 0 dm_multipath 21841 2 dm_round_robin button 9057 0 battery 11209 0 ac 6729 0 hw_random 7137 0 bnx2 147253 0 qla2400 201025 0 ext3 137809 2 jbd 69104 1 ext3 dm_mod 68097 6 dm_mirror,dm_multipath ata_piix 14405 0 libata 78473 1 ata_piix qla2300 127425 0 qla2322 137537 0 cciss 69809 3 qla2xxx 183201 5 qla2400,qla2300,qla2322 scsi_transport_fc 11841 1 qla2xxx sd_mod 19393 2 scsi_mod 141457 5 libata,cciss,qla2xxx,scsi_transport_fc,sd_mod Christopher Wilson Storage Architect Verizon Business IT Solutions - IP Application Hosting ______________________________________________________________________ This e-mail has been scanned by Verizon Managed Email Content Service, using Skeptic? technology powered by MessageLabs. For more information on Verizon Managed Email Content Service, visit http://www.verizonbusiness.com. ______________________________________________________________________ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
