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Full Discussion: /dev/rmt devices are missing
Operating Systems AIX /dev/rmt devices are missing Post 302569909 by zaxxon on Wednesday 2nd of November 2011 03:27:32 AM
Old 11-02-2011
Did cfgmgr complain when being run? Did that DLPAR-action ie. assigning the controller with the attached tape drive to the LPAR show any complaints either?

Can you identify the SCSI controller with the tape drive using lsdev? Is lsdev showing any other type of tape drive but rmt that can be brought into relation to the SCSI controller (that you might have identified)?

Example:
Code:
root@bla1:/root> lsdev -Ccadapter -l *scsi*
sisscsia0 Available 04-08 PCI-X Dual Channel Ultra320 SCSI Adapter
root@bla1:/root> lsdev -Cctape
rmt0 Available 04-08-00-0,0 LVD SCSI 4mm Tape Drive

You can only assign it, if it is on a separate SCSI controller which is not assigned to other LPARs. But if that was not the case, I assumed the HMC might have complained about it.
 

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tms(7)							 Miscellaneous Information Manual						    tms(7)

NAME
tms - TMSCP magnetic tape interface SYNOPSIS
For XMI/KDM on Alpha-based systems: bus xmi0 at iop0 vector xmierror controller uq0 at xmi? port kdm vector uqintr device tape tms0 at uq0 drive 0 For MSI Bus: only MIPS-based DECsystem 5500 bus msi0 at ibus? vector msi_isr controller dssc1 at msi0 msinode 1 device tape tms3 at dssc1 drive 3 For XMI/CI/HSC on Alpha-based systems: bus xmi0 at iop0 vector xmierror bus ci0 at xmi? port np vector cimna_isr controller hsc6 at ci0 cinode 6 device tape tms3 at hsc6 drive 3 For tms devices dual ported between two controllers: device tape tms2 at * drive 2 DESCRIPTION
The TMSCP driver provides a standard tape drive interface, as described in mtio(7). This is a driver for any controller that adheres to the Tape Mass Storage Control Protocol (TMSCP). The TMSCP controllers communicate with the host through a packet-oriented protocol termed the Tape Mass Storage Control Protocol. Tape Support - Alpha-based systems TA78, TA79, TA81, TA90, TA90E, TA91 Diagnostics All diagnostic messages are sent to the error logger subsystem. FILES
/dev/rmt??? /dev/nrmt??? SEE ALSO
mtio(7), MAKEDEV(8), uerf(8), tapex(8) delim off tms(7)
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