Make sure that the cache settings on the RAID controller are not set to Write Through but use Write Back. Check the test.log and look for the ifconfig -a and see if the nics are performing at 1000. Also verify the sda or sdb to see what the hdparm speeds are.
Nice try...
The problem is with iSCSI only. with samba performance is OK.
In any case here are the values you asked for:
*-----------------------------------------------------------------------------*
hdparm -t /dev/cciss/c0d1
*-----------------------------------------------------------------------------*
/dev/cciss/c0d1:
Timing buffered disk reads: 148 MB in 3.01 seconds = 49.14 MB/sec
Just from my DSS Lite test with my 3Ware I get higher when enabling the cache.
hdparm -t /dev/sda
*-----------------------------------------------------------------------------*
/dev/sda:
Timing buffered disk reads: 354 MB in 3.00 seconds = 117.99 MB/sec
Also are these ES (Server ) drives. Try direct connecting to the server. You might want to force the speed to 1000 instead f auto neg in the modify driver feature in the Console Tools.
Hello,
the machine is quite old and 50mb/sec is fine for my purposes.
the problem is that I have that kind of performance when writing using samba.
When using ISCSI I have 3MB/sec only!
The problem is not in the network or disk array (samba is perfoming fast enough), I think the problem is with some parametrt in the scst configuration.
WB Enabled.
Tried different settings:
Default
The one I have on another linux box with SCST and that shows far better write performance
the one proposed for vsphere in some other post
Write performance is always 3MB/sec
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