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Re: [dm-devel] Priozier for remote port on fibre channel devices



On 01/11/2013 08:47 AM, Andreas Bleischwitz continental-corporation com wrote:
Hello Hannes,

sorry for top-posting, but crappy Notes is not really a good client
for mailing-list - at least I don't know how to avoid such mess.

The output is

[root fru3710e ~]# sg_inq /dev/sdc
standard INQUIRY:
   PQual=0  Device_type=0  RMB=0  version=0x04  [SPC-2]
   [AERC=0]  [TrmTsk=0]  NormACA=1  HiSUP=1  Resp_data_format=2
   SCCS=0  ACC=0  TPGS=0  3PC=0  Protect=0  BQue=0
   EncServ=0  MultiP=1 (VS=1)  [MChngr=0]  [ACKREQQ=0]  Addr16=0
   [RelAdr=0]  WBus16=0  Sync=0  Linked=0  [TranDis=0]  CmdQue=1
   [SPI: Clocking=0x0  QAS=0  IUS=0]
     length=193 (0xc1) Peripheral device type: disk
  Vendor identification: EMC
  Product identification: Invista
  Product revision level: 5100
  Unit serial number: CKM00xxxxxxxxx

Hehe. No alua for you (TPGS=0).
But that's EMC for you; probably you should count yourself lucky
that it's not claiming compability to SCSI-2 ...

and well, 'weightedpath' is also available in RHEL, but only queries
for the device name and the SCSI-address. I wanted to query the
remote-port of the storage-device - which is the frontend wwn of the
storage device.

Why don't you use the 'by-path' symlinks for the device name in weightedpath?
They'll include the target port WWN, so should give you what you want.

Cheers,

Hannes
--
Dr. Hannes Reinecke		      zSeries & Storage
hare suse de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)


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