53
•
The tape drive is physically connected to the SAS I/O module
•
The SAS zone configuration is correct
•
The blade has a CFFv SAS adapter
•
The tape drive is powered on
•
All requirements in section 7.2 of this document are met
•
If the tape drive is in
Defined
state, consult section 7.3.2
7.2.4. Sharing a tape drive among multiple blades
A single TS2240 tape drive can be used for VIOS and IBM i backups on multiple blades in the
same chassis. Any blade that requires access to the tape drive must be allowed to use the
external SAS port on the I/O module to which the tape drive is connected (see section 4.7 for
working with the SAS zone configuration). The tape drive can also be restricted to a certain blade
by assigning the correct external SAS port only to that blade.
If the tape drive is accessible by multiple blades, only one VIOS on one blade can use the tape
drive at a time. The first blade on which VIOS is installed and started will recognize and configure
the tape drive as an rmtX device, placing it in
Available
state. In this state, the tape drive can be
used for backups by VIOS or IBM i, as described elsewhere in section 7. Any other instances of
VIOS on different blades will detect the tape drive, but will not be able to configure it and place it
in
Available
state; instead the tape device will be in
Defined
state.
To check the state of the TS2240, use the instructions in section 7.3.1. To switch the tape drive
between blades, use the following steps:
•
On the blade currently owning the tape drive, vary off the TAPxx device in IBM i once
all save operations are complete, using the
WRKCFGSTS *DEV *TAP
command
•
Log into IVM and unassign the rmtX tape device from the i partition by clicking
View/Modify
Virtual Storage
Æ
Optical/Tape
Æ
Modify partition assignment
under
Physical Tape Devices
•
Telnet to VIOS and use this command to unconfigure the tape drive and place it in
Defined
state:
rmdev –dev rmtX –ucfg
(replace rmtX with the correct tape device
name)
•
On the blade to which the tape drive is being switched, Telnet to VIOS and use this
command to configure the tape drive and place it in
Available
state:
cfgdev
•
Assign the tape drive to the IBM i partition, as described in section 7.3.3
Note also that the TS2240 tape drive cannot be disconnected (via the SAS cable) and
reconnected dynamically. If the tape drive is disconnected from the SAS switch, use the steps
above on the same blade to restore access to the TS2240.
7.2.5. Assigning the tape drive to IBM i
•
Log into IVM with padmin or another administrator user profile
•
Click
on
View/Modify Virtual Storage
•
Click on the
Optical/Tape
tab
•
Select
the
rmtX
device under
Physical Tape Resources
•
Click
on
Modify partition assignment
•
Select the correct IBM i partition in the drop-down menu and click
OK
IVM will automatically create a new pair of Virtual SCSI server and client adapters and map the
rmtX
device to the Virtual SCSI server adapter in VIOS. This allows for error logging and
troubleshooting to be performed separately for tape from disk and optical. No action is required
in IBM i if the QAUTOCFG system value is set to “On”: the tape drive will be recognized
