Akai DR16 pro Operator's Manual download pdf (Page 105)

12: Hard Disks

Page 96

Hard Disks

This chapter examines hard disks. Your DR16pro should already have an optional internal hard

disk installed, so you have everything you need to start recording. If the hard disk has not yet been

formatted, see “Formatting Disks” on page 102.

If you want to increase the available recording time by adding more storage, read through this

chapter to gain a better understanding of how the DR16pro works with hard disks. When upgrad-

ing, you can keep the internal hard disk and just add an external hard disk via the SCSI-A bus.

Alternatively, you could replace the internal hard disk with a larger one.

Only certain hard disks can be used with the DR16pro, so please consult your AKAI professional

dealer.

Choosing a Hard Disk

There are many types of hard disks currently available, each with slightly different specifications.

Your AKAI professional dealer will be able to provide you with information about which hard disks

are best for use with the DR16pro. The following points should also be borne in mind:

• Is the hard disk fitted with two SCSI connectors? This will allow you to add more hard disks

simply by connecting to the SCSI-A bus daisy chain.

• Are the SCSI connectors 50-way Amphenol types like the one on the rear panel of the DR16pro?

Some manufacturers use different types of connectors for SCSI connections. Although there

are connection adaptors available, it is much simpler to standardize with one type.

• Can the SCSI ID number be set? Some of the earlier external disk drives were not fitted with

SCSI ID switches. If each hard disk can be set to any SCSI ID, it allows greater flexibility when

setting up a SCSI daisy chain.

• Does it have internal or external SCSI termination? Hard disks supplied with an external

terminator can be connected at any position in a SCSI daisy chain. Some hard disks that have

a fixed internal terminator always have to be connected at the end of the SCSI daisy chain,

thus reducing setup flexibility. This is especially awkward when you have two such hard disks.

• Is the access time fast enough? Most currently available hard disks have relatively quick

access times. However, some older drives can be quite slow. When the DR16pro is playing

and recording at the same time, the disk drive is continuously reading and writing data. If the

hard disk’s average seek time is slower than 9 ms, performance may be affected.

• Is the data transfer rate high enough? This rate is usually measured in Megabits per second

(Mbit/s). A transfer rate slower than 4.0 MByte/s (32 Mbit/s) may affect the performance of the

DR16pro.

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Akai DR16 pro Operator's Manual Page 105