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by Aida Silva
Commercial Systems Division
Product Overview
The A3716A is a high-speed high-capacity tape product combined with an
autoloader. The tape drive conforms to the DDS-3 standard. The autoloader
houses six cartridges in the magazine. DDS-3 tape allows 12 GB of uncompressed
data to be stored on 125m DDS-3 Tapes. It ensures backward compatibility in
reading and writing existing DDS tapes. The sustained data rate on
uncompressed data tape is 1 MBPS.
Support Information
The A3716A is a Single-Ended SCSI-2 Device. The A3716A is supported on MPE/iX
Release 6.0.
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NOTE: The A3716A is NOT supported on MPE/iX 5.0, and there are
currently no plans for 5.0 Support of this device.
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Configuration
A3716A is supported only on MPE/iX NIO platform. It is not supported on MPE/iX
CIO platform. A3716A can be configured on single-ended NIO SCSI card. The
autoloader option switch settings should be set to 6 (Stacker mode). Other
mode settings are NOT supported.
Configuration Example
On an NIO machine, Path 52 is configured as follows:
io>lp 52
PATH: 52 LDEV:
ID: A1703-60003-SCSI TYPE: DA
PMGR: SCSI_DAM PMGRPRI: 6
LMGR: MAXIOS: 0
If the SCSI ID of the device is 3, and path 52.3 is not configured:
io>addpath path=52.3 id=pseudo
io>ad ldev=31 path=52.3.0 id=hpc1557A
Verify the configuration using the LDEV and LP commands as
shown in the following example:
Figure 8-1 Title not available (Configuration )
io>ldev 31
LDEV: 31 DEVNAME: OUTDEV: 0 MODE:
ID: HPC1557A RSIZE: 128 DEVTYPE: TAPE
PATH: 52.3.0 MPETYPE: 24 MPESUBTYPE: 7
CLASS: TAPE
io>lp 52.3.0
PATH: 52.3.0 LDEV: 31
ID: HPC1557A TYPE: TAPE
PMGR: SCSI_TAPE_DM PMGRPRI: 10
LMGR: LOGICAL_DEVICE_MANAGER MAXIOS: 0
io>lp 52.3
PATH: 52.3 LDEV:
ID: PSEUDO TYPE: DA
PMGR: TRANSPARENT_MGR PMGRPRI: 6
LMGR: MAXIOS: 0
Operating Instructions
If you need to store more than one tape per day, you should purchase multiple
devices or consider other technology.
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WARNING! This device is intended for customers who need to store one
tape per day (maximum 12 GB on DDS-3 tape). Writing more than one tape per
day will exceed the duty cycle of this technology. This could result in
premature failure of the device, and more importantly, you may face DATA
LOSS due to unrecoverable errors.
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The A3716A device magazine holds up to 6 DDS tapes.
With this usage, it is recommended that you load the magazine with five DDS-3
cartridges in slots one to five and a cleaning cassette in the sixth slot. The
device should then be configured with the auto tape eject feature. With this
configuration and the magazine loaded with the recommended cartridges, you
could then perform backups Monday through Friday, without any intervention.
After backup on the fifth cartridge, the drive will be cleaned automatically
by the cleaning cassette from the sixth slot.
You can then load new tapes into the magazine (or a new magazine) and start
the next week's cycle.
To set the tape eject option, the autoloader switch setting must be six and
the following command should be issued interactively, before backup is started
(assuming your A3716A is LDEV #31):
:run devctrl.mpexl.telesup 31 eject=enable
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