Redhat AS 4.O, emulex fiber channel hba and Hitachi

[Herta Van den Eynde]

Stephane Branchoux wrote:
> Hello,
> 
> I installed last emulex driver on a Redhat AS4.0 box (kernel 
> 2.6.9-5.ELsmp )
> 
> Driver is loaded but i cant access Lun. All seems OK (Hitachi model, Lun 
> number ...)
> cat /sys/class/scsi_host/host6/port_name returns : 0x10000000c94a23d1 
> (the good WWN)
> 
> When i run lun_scan 6, i have :
> 
> ar 14 18:05:03 maja kernel: Copyright(c) 2003-2005 Emulex.  All rights 
> reserved.
> Mar 14 18:05:09 maja kernel: lpfc 0000:08:09.0: 0:1303 Link Up Event x1 
> received Data: x1 xf7 x8 x0
> Mar 14 18:05:10 maja kernel: scsi6 : Emulex LightPulse LP1050 2 Gigabit 
> PCI Fibre Channel Adapter on PCI bus 08 device 48 irq 161
> Mar 14 18:06:57 maja kernel:   Vendor: HITACHI   Model: 
> DF600F            Rev: 0000
> Mar 14 18:06:57 maja kernel:   Type:   
> Direct-Access                      ANSI SCSI revision: 03
> Mar 14 18:06:57 maja kernel: scsi6 (0,0,209) : reservation conflict
> Mar 14 18:06:57 maja kernel: sdc: Unit Not Ready, error = 0x18
> Mar 14 18:06:57 maja kernel: scsi6 (0,0,209) : reservation conflict
> Mar 14 18:06:57 maja kernel: sdc : READ CAPACITY failed.
> Mar 14 18:06:57 maja kernel: sdc : status=c, message=00, host=0, driver=00
> Mar 14 18:06:57 maja kernel: sdc : sense not available.
> Mar 14 18:06:57 maja kernel: scsi6 (0,0,209) : reservation conflict
> Mar 14 18:06:57 maja kernel: sdc: asking for cache data failed
> Mar 14 18:06:57 maja kernel: sdc: assuming drive cache: write through
> Mar 14 18:06:57 maja kernel:  sdc: sdc1 sdc2 sdc3 sdc7 sdc8
> Mar 14 18:06:57 maja kernel: Attached scsi disk sdc at scsi6, channel 0, 
> id 0, lun 209
> Mar 14 18:06:57 maja kernel: Attached scsi generic sg3 at scsi6, channel 
> 0, id 0, lun 209,  type 0
> Mar 14 18:06:58 maja kernel:   Vendor: HITACHI   Model: 
> DF600F            Rev: 0000
> Mar 14 18:06:58 maja kernel:   Type:   
> Direct-Access                      ANSI SCSI revision: 03
> Mar 14 18:06:58 maja kernel: scsi6 (0,1,209) : reservation conflict
> Mar 14 18:06:58 maja kernel: sdd: Unit Not Ready, error = 0x18
> Mar 14 18:06:58 maja kernel: scsi6 (0,1,209) : reservation conflict
> Mar 14 18:06:58 maja kernel: sdd : READ CAPACITY failed.
> Mar 14 18:06:58 maja kernel: sdd : status=c, message=00, host=0, driver=00
> Mar 14 18:06:58 maja kernel: sdd : sense not available.
> Mar 14 18:06:58 maja kernel: scsi6 (0,1,209) : reservation conflict
> Mar 14 18:06:58 maja kernel: sdd: asking for cache data failed
> Mar 14 18:06:58 maja kernel: sdd: assuming drive cache: write through
> Mar 14 18:06:58 maja kernel:  sdd: sdd1 sdd2 sdd3 sdd7 sdd8
> Mar 14 18:06:58 maja kernel: Attached scsi disk sdd at scsi6, channel 0, 
> id 1, lun 209
> Mar 14 18:06:58 maja kernel: Attached scsi generic sg4 at scsi6, channel 
> 0, id 1, lun 209,  type 0
> Mar 14 18:07:02 maja kernel: Buffer I/O error on device sdc3, logical 
> block 52428784
> 
> Any idea ?
> 
> Many thanks in advance.
> 
It looks like the LUN was previously part of another system which 
reserved the LUN at scsi level.
I recently had the same issue on our SAN with a LUN that used to be 
linked with an AIX server.  Only way I knew how to work around the issue 
was to reassign the LUN to the AIX server and clear the scsi reservation 
from the AIX server.

Hope this helps,

Herta

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