Overview |
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With the release of MPE/iX 6.0, all SCSI
devices must have as part of their device configuration
a pseudo device with a "transparent_mgr" that was created with SYSGEN.
This requirement is for all SCSI devices on
a system running MPE/iX 6.0.
Future I/O technology requires the consistent usage of "transparent_mgr"
in the base MPE/iX I/O configuration.
The default configuration files that are part of the factory
System Load Tape (SLT) all have the "TRANSPARENT_MGR" requirement
built into the device configuration for all SCSI devices.
Today, all systems with SCSI devices should already be configured
with the "transparent_mgr" requirement except for Magneto-Optical(MO)
Devices. Previous MO installation instructions disallowed "transparent_mgr"
in their configuration.
If you are performing an UPDATE to MPE/iX 6.0 or are using
your archived configuration files when performing an INSTALL, you
must check and ensure that each SCSI device
has a "TRANSPARENT_MGR" in its device path, prior to performing
the UPDATE or INSTALL. Failure to perform this step will cause problems
that could lead to inability to access data on the SCSI device.
The remainder of this article provides some examples for configuration
of SCSI devices on HP3000 systems. As with most devices on the HP3000,
SCSI device configuration is done via SYSGEN. The actual entries
made in SYSGEN are dependent upon the device
rather than the I/O architecture (CIO, hybrid or Precision Bus).
On the HP3000 the requirement for configuration of SCSI devices
is to actually make two path entries per device.
The first entry is the pseudo device entry for the "TRANSPARENT_MGR."
This entry is not a logical device itself;
rather, it is a place holder required by the SCSI Device Manager
Software. The second entry is for the actual device itself. This
is true for CIO, "hybrid" or Precision Bus systems even though these
systems use different SCSI controllers.
In the past there was only one set of
devices that did not follow this convention, Magneto-Optical Devices.
With the release of MPE/iX 6.0, Magneto-Optical devices must
also make use of pseudo devices in their configuration. You must
add pseudo devices for the MO Autochanger and
MO disk drives. Not adding pseudo devices for
an MO device on MPE/iX 6.0, will cause problems that could lead
to the inability to access data from this device.
Examples: |
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Pre-MPE/iX 6.0 Configuration
All SCSI devices, except Magneto-Optical
devices should have a "transparent_mgr" configured in systems running
MPE/iX versions prior to MPE/iX 6.0.
This example shows the standard MPE/iX 5.5 SCSI device configuration,
for a C1700A 20GB Magneto-Optical Jukebox. This library is actually
made up of an Autochanger and two disk drives, resulting in three
LDEVs associated with this library. Notice that the 'TRANSPARENT
MANAGER' is not used with any of these devices.
Notice also that this happens to be a Precision Bus system.
PATH: 24 LDEV:
ID: A1703-60003-SCSI TYPE: DA
PMGR: SCSI_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
PATH: 24.3 LDEV: 31 ^
ID: HPC1700A TYPE: AC |
PMGR: SCSI_AC_DM PMGRPRI: 10 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 | These three
| Logical
PATH: 24.4 LDEV: 32 | Devices
ID: HPC1701A TYPE: DISC | represent
PMGR: SCSI_DISC_DM PMGRPRI: 8 | ONE C1700A
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 | 20GBtye
| Device
PATH: 24.5 LDEV: 33 |
ID: HPC1701A TYPE: DISC |
PMGR: SCSI_DISC_DM PMGRPRI: 8 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 v |
MPE/iX 6.0 Magneto-Optical Device Configuration
This example is the new/proper configuration for the C1700A
20GB Magneto-Optical Jukebox on MPE/iX 6.0. This device is made
up of the Autochanger and two disk drives resulting in three LDEVs
associated with this library. Notice that the 'TRANSPARENT MANAGER'
must now be used with both the Autochanger
and disk drives. Notice also that this happens to be a Precision
Bus system.
PATH: 24 LDEV:
ID: A1703-60003-SCSI TYPE: DA
PMGR: SCSI_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
PATH: 24.3 LDEV:
ID: PSEUDO TYPE: DA
PMGR: TRANSPARENT_MGR PMGRPRI: 6
LMGR: MAXIOS: 0
PATH: 24.3.0 LDEV: 31 ^
ID: HPC1700A TYPE: AC |
PMGR: SCSI_AC_DM PMGRPRI: 10 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 | These three
| Logical
PATH: 24.4 LDEV: | Devices
ID: PSEUDO TYPE: DA | represent
PMGR: TRANSPARENT_MGR PMGRPRI: 6 | ONE C1700A
LMGR: MAXIOS: 0 | 20GBtye
| Device
PATH: 24.4.0 LDEV: 32 |
ID: HPC1701A TYPE: DISC |
PMGR: SCSI_DISC_DM PMGRPRI: 8 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 |
|
PATH: 24.5 LDEV: |
ID: PSEUDO TYPE: DA |
PMGR: TRANSPARENT_MGR PMGRPRI: 6 |
LMGR: MAXIOS: 0 |
|
PATH: 24.5.0 LDEV: 33 |
ID: HPC1701A TYPE: DISC |
PMGR: SCSI_DISC_DM PMGRPRI: 8 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 v |
MPE/iX 6.0 Tape Configuration
This example shows a standard SCSI tape device configuration.
This form should be followed for all SCSI devices including Magneto-Optical
Devices on MPE/iX 6.0. This particular example shows the configuration
for the HPC1503B tape drive using the ID= HPC1503B. Notice that
this happens to be a Precision Bus system.
PATH: 52 LDEV:
ID: A1703-60003-SCSI TYPE: DA
PMGR: SCSI_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
PATH: 52.0 LDEV: ^
ID: PSEUDO TYPE: DA | Repeat for
PMGR: TRANSPARENT_MGR PMGRPRI: 6 | each
LMGR: MAXIOS: 0 | Physical
| Device
PATH: 52.0.0 LDEV: 7 |
ID: HPC1503B TYPE: TAPE |
PMGR: SCSI_TAPE_DM PMGRPRI: 10 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 v |
MPE/iX 6.0 Disk Device Configuration
This particular example shows the configuration for the 2.0
GB version of the C302x disk using the ID= HPC3010M1 (the 1.0 GB
version is HPC2247M1). Notice that this happens to be a CIO system.
PATH: 6/4.4 LDEV:
ID: HP27251A TYPE: DA
PMGR: CIO_SCSI_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
PATH: 6/4.4.6 LDEV: ^
ID: PSEUDO TYPE: DA | Repeat for
PMGR: TRANSPARENT_MGR PMGRPRI: 6 | each
LMGR: MAXIOS: 0 | Physical
| Device
PATH: 6/4.4.6.0 LDEV: 16 |
ID: HPC3010M1 TYPE: DISC |
PMGR: SCSI_DISC_DM PMGRPRI: 8 |
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0 v |
