No, there is nothing created for the problematic node, the LUN is only available via the node's partner:
# /usr/bin/sg_luns -d -vv /dev/sdb open /dev/sdb with flags=0x802 report luns cdb: a0 00 00 00 00 00 00 00 20 00 00 00 report luns: requested 8192 bytes but got 16 bytes Lun list length = 8 which imples 1 lun entry
Output response in hex 00 00 00 00 08 00 00 00 00 00 01 00 00 00 00 00 00 Report luns [select_report=0]: 0001000000000000 Peripheral device addressing: lun=1
On Thu, Oct 15, 2015 at 11:12 AM, andrei.borzenkov@ts.fujitsu.com andrei.borzenkov@ts.fujitsu.com wrote:
Is any /dev/sg created for *anything* on this target? You can actually use any device name for REPORT LUNS; and it should always be possible to send command to LUN 0.
With best regards
Andrei Borzenkov Senior system engineer FTS WEMEAI RUC RU SC TMS FOS
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-----Original Message----- From: vladimir.zhigulin@gmail.com [mailto:vladimir.zhigulin@gmail.com] On Behalf Of Momonth Sent: Thursday, October 15, 2015 11:45 AM To: Borzenkov, Andrei Cc: John Stoffel; toasters@teaparty.net Subject: Re: CentOS 6.7 + cDOT 8.3.1: kernel: scsi: host X channel Y id Z lun4194304 has a LUN larger than allowed by the host adapter
There is actually no block device (/dev/sd?) being created for the problematic LUN, I really need to say "the problematic SAN paths" here, as only one node replies something the Linux kernel / HBA driver can not handle.
On Thu, Oct 15, 2015 at 10:27 AM, andrei.borzenkov@ts.fujitsu.com andrei.borzenkov@ts.fujitsu.com wrote:
I actually mean - dump for LUN having issues ...