topic Re: See /dev/floppy entries on T-class server instead of HITACHI disks in Operating System - HP-UX

See /dev/floppy entries on T-class server instead of HITACHI disks

Keith C. Patterson — Mon, 17 Jun 2002 14:15:03 GMT

Hello,
I have a T-Class (HP 11.0) server with a 28696A HBA connected to a 5800. Both are F/W SCSI interfaces but all I see is a number of /dev/floppy entries. See ioscan output attached. I see all of the drivers for the disk in the system file.
Has anyone seen this before? If so, should I just use these as the HITACHI disks and add them to volume groups?
Is there a specific driver/firmware level that is needed?
Thanks in advance.

Re: See /dev/floppy entries on T-class server instead of HITACHI disks

Stefan Farrelly — Mon, 17 Jun 2002 14:27:58 GMT

Your ioscan looks fine. Along with the floppy entires are your normal /dev/dsk and /dev/rdsk entries. Just use these to add the disks into your volume groups and use as normal. We've used Hitachi disks like this before on HP's without any problems.

The only thing you may need to look into with non-native disks like this is the scsi queue depth. Check them using the scsictl command;
scsictl -a /dev/rdsk/cxxxxxx

You may need to adjust the queue_depth paramater which can easily be done using the same scsictl command, and it disappears on each reboot so you may need a system startup job to reset it. You should only do this if you start getting queue depth errors in dmesg and syslog once the disks get under heavy load.

Re: See /dev/floppy entries on T-class server instead of HITACHI disks

Sanjay_6 — Mon, 17 Jun 2002 14:29:11 GMT

Hi Keith,

Looks okay to me. I can see the /dev/floppy in my ioscan output too. The one that you are interested in are there /dev/dsk and /dev/rdsk entries. You can add these pv's into your vg's and create lv's as you normally would with a regular disk.

Everything looks fine to me.

Hope this helps.

Regds

Re: See /dev/floppy entries on T-class server instead of HITACHI disks

Christopher McCray_1 — Mon, 17 Jun 2002 14:29:16 GMT

Hello,

I have seen this before, attached is the output of my T-class. I believe it has to do with the disk3 driver.

Hope this helps

Chris