How to fix slow performance in SAN
Posted on 2008-10-17
After update the firmware from SAN switch from version 5.1.0d to version 5.3.0d the performance between the SAN devices are very slow. Make some test with HP Tape tool: Read performance against one MSA1000 (Raid 5 and Raid 1 volumes) ~ 30MB/sec. Write performance same MSA1000 ~ 20MB/sec.
Validate the results with another MSA1000 (Raid5). Check show_techsupport on both MSA. No errors and internal speed of HD's set to 160MB/sec.
All HBA set to 2Gb/sec.
Make a Backup from one tape to the other tape over fiber (MSL6030 with LTO3 drives and NSR 160 Manager) with ~ 20MB/sec.
Validate all settings from HP support: Removable storage-> disabled, HP Agenten for fiber/scsi/tape->disabled.
HP Techsupport don't know how to help..(Point to the fiber cable that is conected on the Backup server...)
Has anyone simmilar issues with firmware 5.3.0d on SAN switch or any other TIP for me?