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rx4640 ULTRA320 SCSI ADAPTER HDD speed

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Occasional Visitor

rx4640 ULTRA320 SCSI ADAPTER HDD speed

Hi

 

I have 2 absolutely same rx4640 servers with same hardware. Today I reboot one server and see that it's HDD works on low speed (80 MB/s). I made an ivstigation and find this result:

 

Server 1:

 

# mptconfig /dev/mpt2

 Device File                   : /dev/mpt2
 Hardware Path                 : 0/1/1/0

---- BUS PARAMETERS ----------------------------------------------------------

 Initiator SCSI ID             : 7
 SCSI Bus Rate                 : Ultra320
 SCSI Bus Width                : Wide

---- TARGET PARAMETERS -------------------------------------------------------
 Target   Description        Firmware  In Use     In Use
   Id                        Version   Rate       Width
------------------------------------------------------------------------------
    0     ST373454LC         HPC2      Ultra320   Wide
    1     ST373454LC         HPC2      Ultra320   Wide

------------------------------------------------------------------------------

Server 2:

# mptconfig /dev/mpt2

 Device File                   : /dev/mpt2
 Hardware Path                 : 0/1/1/0

---- BUS PARAMETERS ----------------------------------------------------------

 Initiator SCSI ID             : 7
 SCSI Bus Rate                 : Ultra2
 SCSI Bus Width                : Wide

---- TARGET PARAMETERS -------------------------------------------------------
 Target   Description        Firmware  In Use     In Use
   Id                        Version   Rate       Width
------------------------------------------------------------------------------
    0     ST373454LC         HPC2      Ultra2     Wide
    1     ST373454LC         HPC2      Ultra2     Wide

Hardware is same.

 

Why one server 2 SCSI Bus Rate is Ultra2?

2 REPLIES
Acclaimed Contributor [Founder]

Re: rx4640 ULTRA320 SCSI ADAPTER HDD speed

Try to set a new value.

 

# mptconfig
 Usage: mptconfig [options] <dev_file>
        <dev_file>  = /dev/mptX

 Options:
   -i initiator_id = 0 to 15
   -t target_id    = 0 to 15
   -r rate         = ultra|ultra2|ultra160|ultra320
   -w width        = narrow|wide
   -d set default values for scsi bus
       default values are:
       initiator_id = 7
       rate         = ultra320
       width        = wide

 

and check if it stays with the values.


Hope this helps!
Regards
Torsten.

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Occasional Visitor

Re: rx4640 ULTRA320 SCSI ADAPTER HDD speed

Thank you. This helps.