[dm-devel] multipath-tools - checker for DDN S2A8500

[Hannes Reinecke]

Frederic TEMPORELLI wrote:
> Hello,
> 
> 
> When using multipath-tools 0.4.7, I would like to reports that DDN 
> S2A8500 disk array reports a wrong status whith 'readsector0' checker. 
> 'directio' seems to be the right checker for such storage system (see 
> following logs).
> Can you update hwtable.c in this way ?
> 
> 
> multipathd logs when using 'readsector0':
> 
> [root at iotiger2 ~]# multipathd -d -v3
> Jul 26 10:53:59 | --------start up--------
> Jul 26 10:53:59 | read /etc/multipath.conf
> Jul 26 10:53:59 | dm-0: blacklisted
> Jul 26 10:53:59 | dm-1: blacklisted
> Jul 26 10:53:59 | dm-2: blacklisted
> Jul 26 10:53:59 | dm-3: blacklisted
> Jul 26 10:53:59 | hda: blacklisted
> Jul 26 10:53:59 | loop0: blacklisted
> Jul 26 10:53:59 | loop1: blacklisted
> Jul 26 10:53:59 | loop2: blacklisted
> Jul 26 10:53:59 | loop3: blacklisted
> Jul 26 10:53:59 | loop4: blacklisted
> Jul 26 10:53:59 | loop5: blacklisted
> Jul 26 10:53:59 | loop6: blacklisted
> Jul 26 10:53:59 | loop7: blacklisted
> Jul 26 10:53:59 | ram0: blacklisted
> Jul 26 10:53:59 | ram1: blacklisted
> Jul 26 10:53:59 | ram2: blacklisted
> ...
> Jul 26 10:53:59 | sdc: not found in pathvec
> Jul 26 10:53:59 | sdc: mask = 0x1f
> Jul 26 10:53:59 | sdc: bus = 1
> Jul 26 10:53:59 | sdc: dev_t = 8:32
> Jul 26 10:53:59 | sdc: size = 571416576
> Jul 26 10:53:59 | sdc: vendor = DDN
> Jul 26 10:53:59 | sdc: product = S2A 8500
> Jul 26 10:53:59 | sdc: rev = 5.22
> Jul 26 10:53:59 | sdc: h:b:t:l = 4:0:0:0
> Jul 26 10:53:59 | sdc: tgt_node_name = 0x20000001ff0302a8
> Jul 26 10:53:59 | sdc: serial =
> Jul 26 10:53:59 | sdc: path checker = readsector0 (config file default)
> Jul 26 10:53:59 | sdc: state = 1
> Jul 26 10:53:59 | sdc: checker msg is "readsector0 checker reports path 
> is down"
> Jul 26 10:53:59 | sdc: getuid = /sbin/scsi_id -g -u -s /block/%n (config 
> file default)
> Jul 26 10:53:59 | sdc: uid = 360001ff02002110102a8fe1c220f0100 (callout)
> Jul 26 10:53:59 | sdd: not found in pathvec
> Jul 26 10:53:59 | sdd: mask = 0x1f
> Jul 26 10:53:59 | sdd: bus = 1
> Jul 26 10:53:59 | sdd: dev_t = 8:48
> Jul 26 10:53:59 | sdd: size = 571416576
> Jul 26 10:53:59 | sdd: vendor = DDN
> Jul 26 10:53:59 | sdd: product = S2A 8500
> Jul 26 10:53:59 | sdd: rev = 5.22
> Jul 26 10:53:59 | sdd: h:b:t:l = 4:0:0:1
> Jul 26 10:53:59 | sdd: tgt_node_name = 0x20000001ff0302a8
> Jul 26 10:53:59 | sdd: serial =
> Jul 26 10:53:59 | sdd: path checker = readsector0 (config file default)
> Jul 26 10:53:59 | sdd: state = 1
> Jul 26 10:53:59 | sdd: checker msg is "readsector0 checker reports path 
> is down"
> Jul 26 10:53:59 | sdd: getuid = /sbin/scsi_id -g -u -s /block/%n (config 
> file default)
> Jul 26 10:53:59 | sdd: uid = 360001ff02002110102a8fe20220f0300 (callout)
> Jul 26 10:53:59 | sde: not found in pathvec
> ...
> 
> then, multipathd logs when using 'directio':
> 
> Jul 26 10:56:09 | --------start up--------
> Jul 26 10:56:09 | read /etc/multipath.conf
> Jul 26 10:56:09 | dm-0: blacklisted
> Jul 26 10:56:09 | dm-1: blacklisted
> Jul 26 10:56:09 | dm-2: blacklisted
> Jul 26 10:56:09 | dm-3: blacklisted
> Jul 26 10:56:09 | dm-4: blacklisted
> Jul 26 10:56:09 | hda: blacklisted
> Jul 26 10:56:09 | loop0: blacklisted
> Jul 26 10:56:09 | loop1: blacklisted
> Jul 26 10:56:09 | loop2: blacklisted
> Jul 26 10:56:09 | loop3: blacklisted
> Jul 26 10:56:09 | loop4: blacklisted
> Jul 26 10:56:09 | loop5: blacklisted
> Jul 26 10:56:09 | loop6: blacklisted
> Jul 26 10:56:09 | loop7: blacklisted
> Jul 26 10:56:09 | ram0: blacklisted
> Jul 26 10:56:09 | ram1: blacklisted
> Jul 26 10:56:09 | ram2: blacklisted
> ...
> Jul 26 10:56:09 | sdc: not found in pathvec
> Jul 26 10:56:09 | sdc: mask = 0x1f
> Jul 26 10:56:09 | sdc: bus = 1
> Jul 26 10:56:09 | sdc: dev_t = 8:32
> Jul 26 10:56:09 | sdc: size = 571416576
> Jul 26 10:56:09 | sdc: vendor = DDN
> Jul 26 10:56:09 | sdc: product = S2A 8500
> Jul 26 10:56:09 | sdc: rev = 5.22
> Jul 26 10:56:09 | sdc: h:b:t:l = 4:0:0:0
> Jul 26 10:56:09 | sdc: tgt_node_name = 0x20000001ff0302a8
> Jul 26 10:56:09 | sdc: serial =
> Jul 26 10:56:09 | sdc: path checker = directio (config file default)
> Jul 26 10:56:09 | sdc: state = 0
> Jul 26 10:56:09 | sdc: getprio = /bin/true (config file default)
> Jul 26 10:56:09 | sdc: prio = 0
> Jul 26 10:56:09 | sdc: getuid = /sbin/scsi_id -g -u -s /block/%n (config 
> file default)
> Jul 26 10:56:09 | sdc: uid = 360001ff02002110102a8fe1c220f0100 (callout)
> Jul 26 10:56:09 | sdd: not found in pathvec
> Jul 26 10:56:09 | sdd: mask = 0x1f
> Jul 26 10:56:09 | sdd: bus = 1
> Jul 26 10:56:09 | sdd: dev_t = 8:48
> Jul 26 10:56:09 | sdd: size = 571416576
> Jul 26 10:56:09 | sdd: vendor = DDN
> Jul 26 10:56:09 | sdd: product = S2A 8500
> Jul 26 10:56:09 | sdd: rev = 5.22
> Jul 26 10:56:09 | sdd: h:b:t:l = 4:0:0:1
> Jul 26 10:56:09 | sdd: tgt_node_name = 0x20000001ff0302a8
> Jul 26 10:56:09 | sdd: serial =
> Jul 26 10:56:09 | sdd: path checker = directio (config file default)
> Jul 26 10:56:09 | sdd: state = 0
> Jul 26 10:56:09 | sdd: getprio = /bin/true (config file default)
> Jul 26 10:56:09 | sdd: prio = 0
> Jul 26 10:56:09 | sdd: getuid = /sbin/scsi_id -g -u -s /block/%n (config 
> file default)
> Jul 26 10:56:09 | sdd: uid = 360001ff02002110102a8fe20220f0300 (callout)
> Jul 26 10:56:09 | sde: not found in pathvec
> Jul 26 10:56:09 | sde: mask = 0x1f
> Jul 26 10:56:09 | sde: bus = 1
> Jul 26 10:56:09 | sde: dev_t = 8:64
> Jul 26 10:56:09 | sde: size = 571416576
> Jul 26 10:56:09 | sde: vendor = DDN
> Jul 26 10:56:09 | sde: product = S2A 8500
> Jul 26 10:56:09 | sde: rev = 5.22
> Jul 26 10:56:09 | sde: h:b:t:l = 4:0:0:2
> Jul 26 10:56:09 | sde: tgt_node_name = 0x20000001ff0302a8
> Jul 26 10:56:09 | sde: serial =
> Jul 26 10:56:09 | sde: path checker = directio (config file default)
> Jul 26 10:56:09 | sde: state = 0
> Jul 26 10:56:09 | sde: getprio = /bin/true (config file default)
> Jul 26 10:56:09 | sde: prio = 0
> Jul 26 10:56:09 | sde: getuid = /sbin/scsi_id -g -u -s /block/%n (config 
> file default)
> Jul 26 10:56:09 | sde: uid = 360001ff02002110102a8fe24220f0500 (callout)
> ...
> 
Have you tested the 'tur' checker?
I'd generally prefer that one as it doesn't require a disk read ...

Cheers,

Hannes
-- 
Dr. Hannes Reinecke			hare at suse.de
SuSE Linux Products GmbH		S390 & zSeries
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