finding out about QLogic features
My colleagues are going to hang me if my system produces further path failovers.
I use a QLogic 2312-based HBA (FastT FC2-133) in failover mode on a LinuX HA-cluster.
Everything works fine, but the driver causes several failovers per day without an urgent reason.
We're using a FastT 700 via McData fabric switches.
Driver version 6.06-fo, Firmware 1.25, Kernel 2.4.18.
Maybe I need to tune the driver's parameters to extend some timeouts. Maybe it's as simple as an upgrade.
I found out that a FastT requires more retries than are set by default. QLogic support has given me some hints what to cause the scsi subsystem to do.
In short: I have to set a bigger retry count when a device proclaims a not-ready condition.
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From my experience it is best to understand first how it works before setting weird
parameters.
Especially due to the use within a failover cluster it could cause timing problems.
Are there any docs around to make a non-programmer understand the HBA-sd_mod interaction technique and it's implications?
Is this the right mailing list for me?
Thanks in advance
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Thomas Meller mailto: [email protected] mailto: [email protected] ---- ...Our continuing mission: To seek out knowledge of C, to explore strange UNIX commands, and to boldly code where no man page has ever been seen