User`s guide

Chapter 5: DigiDrive Management for Mac OS 21
chapter 5
DigiDrive Management for Mac OS
To keep your DigiDrive and other hard drives on
your Macintosh operating system in peak oper-
ating condition, you should perform mainte-
nance operations and checks on a regular basis.
This chapter contains the following sections:
◆
Checking DigiDrives
◆ Initializing DigiDrives
◆
Troubleshooting
Checking DigiDrives
Many drive problems are not hardware related,
but are instead problems with the file system
written on the drive. The file system consists of
data structures that hold critical information
about the files stored on your drive. Some of
these data structures allow your drive to be rec-
ognized as a Macintosh volume.
Using utilities such as Disk First Aid™ and
Norton Disk Doctor™ helps to maintain the file
system and its data structures. Digidesign rec-
ommends periodic use of these utilities on any
DigiDrive and other hard drives, as well as your
Macintosh internal drive, to ensure a healthy
file system.
File system errors tend to grow over time. They
should be fixed as soon as possible after discov-
ery. File system errors are generally caused by
system crashes, improper system shutdowns,
and power failures. They should not be inter-
preted as a precursor to a mechanical drive fail-
ure.
The following list contains examples of some
common file system structure errors that
Norton Disk Doctor can diagnose and, in most
cases, fix without damaging data (media files or
project data):
◆
Master directory block errors
◆ Alternate master directory block errors
◆
Leaf node errors
◆
Header node errors
◆ Volume bit map errors
◆
Files with bad creation dates
Every drive has a directory or index that informs
the system where files reside. If the directory be-
comes damaged or corrupted, the system will
not be able to locate the files.