User guide

B: BACKUP-Pressing B for the BACKUP option starts the Mirror
option for recording
an image (a copy of all or part of the Corvus
hard disk) on the VCR. See
below in this chapter.
V: VERIFY-Pressing V for the VERIFY option makes the Mirror
read a video tape image to check if the image has been
properly
recorded. A search is made for hard and soft recording errors and a
status report
is displayed on the screen. If a different VCR machine
will
be used for the RESTORE option than for the original BACKUP
recording, you can perform a verify pass
to check the head
alignment on the VCR.
I: IDENTIFY -Pressing I for the IDENTIFY option tells the Mirrorto
read the initial header block which is created at the beginning of
each image. This header
block has the date, time, a name, a
comment, and format information, which
helps you locate images
on the video tape if you have
several images on the same tape. The
Mirror program
displays an error message on your CRT if the initial
header block cannot be found in about 1 minute on the video
cassette.
R: RESTORE-Pressing R for the RESTORE option copies a video
cassette image back onto the Corvus disk. This image may
be stored
in a different disk
location than the original data copied by the
Mirror.
The RETRY Function
The RETRY function is part of the VERIFY and RESTORE options
of the Mirror.
If you need to use this function after performing either a
VERIFY or a RESTORE, a screen message is displayed that alerts you
to the number
of blocks that need to be retried. With the RETRY
function, the Mirror program attempts to reconstruct data from
blocks with errors to create a block without errors.
Exiting the Mirror Program
You can exit from the Mirror program back to the CP/M prompt by
preSSing <CNTL> C, except in the middle of actual Mirror operations.
9