IBM TotalStorage 3494 Tape Library, Operator'S Manual

Page: 433 / 605

Set write protect mode
The Set write protect mode page is shown in Figure 255 on page 408. This page
allows the operator to enable and disable the following VTC modes:
v write protect mode (enable and disable)
v
read-only mode (enable only)
v read/write disconnected mode (enable only)
Availability of these modes to the operator depends on the status of the PtP and
VTC.
VTC online
A VTC enters the online state at initialization when one of two conditions
exist:
v
It can communicate with both VTSs, or
v It can communicate with only one VTS that is connected to another VTC
already in the online state
When the VTC is online, the operator can only enable or disable write
protect mode, as shown in Figure 255 on page 408. In this case, the page
shows the following informational items:
v the current status of write protect mode, either enabled or disabled
v
a warning to the operator that enabling write protect mode causes
pending write requests to fail, possibly resulting in job failures
v a caution to the operator to ensure that there are no active jobs being
written to tape before enabling write protect mode
There are three pushbuttons available to the operator on this page:
Enable Write Protect Mode
Pressing this pushbutton enables write protect mode.
Disable Write Protect Mode
Pressing this pushbutton disables write protect mode.
a06c0478
Figure 254. PtP VTS Specialist Perform Standalone Operations Page
Chapter 6. Advanced Operating Procedures
407