Alpha Microsystems AM-649 Instrukcja Obsługi Pobierz pdf (Strona 20)

Installation Instructions: AM-650 1/4" Streaming Tape Drive Page 17

PDI-00650-00, Rev. A00

This means that, if you use TMODE to set, for example, QIC-150 format, then switch

tapes, the AM-650 will try to write to the new tape in QIC-150 format. If the tape does

not support this format, the write operation will fail!

4. To write to a different kind of tape, you need to use TMODE again to set the proper recording

format for the new tape. You need to continue to use TMODE each time you switch tapes until

you reset the computer. After the reset, the AM-650 will again automatically use the correct

format for each tape.

For example, you normally back up your computer using 13GB tapes. You just put the tape in: the AM-

650 recognizes the cartridge type and uses the same format (compressed or uncompressed) previously

used on this tape. But, one day you need to make a tape in QIC-150 format so you can transfer

information to another computer using an AM-625 drive. The smallest tape you have is a DC6525. You

put this tape in, then use TMODE to set the recording format to QIC-150. After transferring the data,

you want to start your nightly backup. You must put in the 13GB tape, then use TMODE to set the

recording format to QIC-5010 or QIC-5010C. If you don’t use TMODE, the AM-650 will try to use

QIC-150 format on the 13GB tape, and your backup will not work.

In summary, during normal backup and restore operations, you probably won’t need to use TMODE:

The AM-650 automatically uses the right format for your tapes. But,

once you use TMODE to change

format, you must continue to use it until you reset the computer

. Please see the TMODE reference

sheet in the

System Commands Reference Manual

for complete instructions on using TMODE.

Spanning Tapes

The AM-650 supports tape spanning only in the QIC-150 and QIC-525 formats. Writing to larger tapes

(1GB and above) does not support spanning.

If you do span tapes, you must use the same size tapes for all tapes in a save set. You cannot start

a backup on a DC6150 cartridge and continue it on a DC6525.

Warm Booting

To warm boot from an AM-650, access your computer’s CMOS configuration menu and make sure the

alternate boot ID is set to the proper ID. See you computer

Owner’s Manual

for instructions on using the

CMOS menu.

On computers which use boot ID switches instead of CMOS configuration—Roadrunner 030 and

040 systems and Eagles other than the Super Eagle—the AM-650 must be set to a higher SCSI ID

than any other tape drive, and the boot ID switches must be set correctly. Figure 9 shows the

correct boot switch settings.

Warm booting from the AM-650 is not supported on the AM-4000. If you have an AM-650 on an

AM-4000,

do not

set the boot ID switches to boot from the tape device. If you do, you may not

be able to boot your computer at all!

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