about insf and disks..

[Stefano_65]

hi everybody
I'm testing a very old D Class (D230), with hp-ux 11.0.
There are 2 disks, and a CDROM. Everything is ok.
Now I'm addind some extra disks, an old scsi enclosure (hp6000 scsi se), with some disks.
The problem is so strange: when enclosure is powered on, the hardware path and special file of cdrom disappear, and is substituted by the same hwpath and special file that belong to one of the enclosure's disks.
What I've to do?

thanx
s.

[Luk Vandenbussche · Accepted solution]

Hi,

Probably the SCSI ID of a Disk off your HP6000 is the same as the SCSI id of your CD.

Change the SCSI ID so that you don't have a duplicate id.

[Jeff Schussele]

Hi,

You're probably on the same bus as the CD & one of the disks has the same SCSI ID.
You need to determine which one of the disks is using that ID & change it.

HTH,
Jeff

[Borislav Perkov]

Hi,
Check the SCSI address setings on the enclosure.
It looks like it is the same as other devices path.
Regards,
Borislav

[Stefano_65]

thanks guys!

[Patrick Wallek]

You almost certainly have a SCSI ID conflict between one of the disks in the enclosure and the CD-ROM.

On the D-class machines the internal CD-ROM is on the same SCSI bus as the external SE-SCSI connector.

To solve the problem, change the SCSI ID on the disk in the enclosure that is causing the problem.

Also remember that on a SE bus, you can only have 8 devices, SCSI ID's 0 thru 7, and the controller takes up one of those IDs.

[Stefano_65]

thanks everybody... but I don't know how to change SCSI Id on te enclosure...

[Luk Vandenbussche]

You change the scsi id internally.

There is jumper set of each disk installed in the hp6000

[Stefano_65]

ehmm.. ok thanks.

[Patrick Wallek]

On those HP6000 trays/enclosures, if they are set up correctly, there should be 5 sets of switches on the back. Each set of switches should have 4 toggles that can be turned on or off.

Those toggles are used to set the SCSI ID. For single-ended devices you will NOT use the toggle that is farthest left in each set of switches (that is the 8 bit, which does not apply to SE). The other 3 toggles are, from left to right, the 4 bit, 2 bit and 1 bit.

The toggles that are on control the SCSI id.

If all are off, then your ID is 0. If the 4-bit and 1-bit are on, then your ID is 5. If all 3 are on, your ID is 7.

To set the ID, first turn off the enclosure, set the ID, then turn the enclosure back on. Then try reattaching to your machine and see what shows up.

Good luck.

[Patrick Wallek]

I should add that each set of switches corresponds to one disk in the enclosure. If the enclosure does not have 5 disks, then you may have to experiment until you figure out which disks are active. You could also tell by looking at your ioscan output and then looking at the swithces to determine what SCSI ID's correspond to what you see on the enclosure and what the system sees.

There is also the possibility that whoever set up the enclosure set up the disks to NOT use the switches on the back. In that case you will have to take the thing apart and check the disks themselves. If that is the case, just take your time and try not to get frustrated. Those 6000 enclosures are a pain in the a** to work on.

[Vivekanandan Somanathan]

Hi Stefano,

This might be a conflict error. Change SCSI id and try the following :

inst -e

ioscan -fn | more

Check whether both are claimed or not .

- Vivek