Videoswitch VDM - Manual (Page 56)

Videoswitch
VDM Digital Recorder
Vdm601t.doc
48
11 Changing Hard Drives
The VDM Digital Recorders are supplied with two removable hard drive drawers. Depending on the
configuration, hard disc drives may be fitted in both of these drawers, or just one or in neither.
The VDM requires at least one hard drive in order to be capable of recording images.
A hard drive may be changed while the unit is powered up. A drive may need changing for one of these
reasons:
• To transfer all the recorded images to another VDM system, for example at another location
• To keep all the evidence relating to a serious crime
• To extend the storage capacity by using a pool of hard drives
• If a drive fails, it can be quickly replaced without having to return the whole unit for repair.
• If a VDM is being swapped for any reason, then all the recorded data can be transferred to the
replacement unit.
11.1 Managing Hard Drives
11.1.1 Single Hard Drive Operation
A single hard drive may be fitted in either
DRIVE1 or DRIVE2 drawers.
11.1.2 Dual Hard Drive Operation
When two drives are fitted, the VDM (normally) automatically alternates between them, switching when the
one currently being used becomes full.
11.1.3 Changing Hard Drives
The hard drive drawers require a special key to unlock them. Insert the key, and turn it clockwise to unlock
the drive. This will remove power from the drive. Wait for 30 seconds for the drive to stop spinning, and
then remove the drive by lifting the drawer handle up, and pulling firmly.
Hard drives are sensitive mechanical devices that may be damaged by shock or vibration. Always handle
with care and when transporting drives, ensure they are well cushioned with suitable padding to protect
them from shock and vibration.
To put a hard drive back into the VDM, make sure that the lock in the drive drawer is in the unlocked
position. Carefully slide the drawer in as far as it can go with the handle in the up position. Carefully push the
handle down such that the drawer is pulled into the drive bay. When it is properly located, lock the drawer by
turning the key counter-clockwise. The LEDs should come on again, indicating that power has been applied
to the drive again.
After changing a drive, enter the
DRIVES screen, and press YES
make the system re-scan the drives (see
section 9.1). Check that the correct drive information is reported.
11.1.4 Warnings
A hard drive should not be changed while it is being used to record as this may affect parking of the heads
within the drive. Always allow approximately 30 seconds after removing power before moving a hard drive.
This ensures that the platters have stopped spinning.
Do not remove a hard drive while a CD is being written to as the write process may be affected.