Spectra Logic ait-5 補足マニュアル

Spectra 2K Library AIT-4 Drive Upgrade

10

The following table summarizes the specifications for Sony AIT drives. 

The following table summarizes the information carried by the drive’s LEDs:

Ambient operating temperature

a

a.

This applies to the drives; the limits for the library are given in the library user guide.

+41°F to +104°F

(+5°C to +40°C)

Storage temperature 

-40°F to +158°F

(-40°C to +70°C)

Operating humidity

20% to 80% non-condensing 

MTBF

200,000 hours @ 
100% duty cycle

300,000 hours @ 
100% duty cycle

400,000 hours @ 
100% duty cycle

400,000 hours @ 
100% duty cycle

Average file access time 

< 55 seconds

< 27 seconds

< 27 seconds

< 52 seconds

Uncorrectable error rate

Less than 1 x 10

-17

 bits

Sustained transfer rate

b, c

 

b.

This is a per-drive value. Total sustained transfer rate for the library depends on the number of drives installed in the library.

c.

The sustained transfer rate can increase by an average of 2.6 times with compression, dependent on the type of data.

3 MB/sec native

6 MB/sec native

12 MB/sec native

24 MB/sec native

Burst transfer rate
(synchronous maximum) 

d

d.

The actual burst transfer rate is limited by the performance of the SCSI HBA, the controller, and the buffer control hardware.

40 MB/sec 

40 MB/sec 

160 MB/sec 

160 MB/sec 

Off

a

a. Off: no color in the LED

No Tape

Cleaning is not necessary

No media error occurred

On

b

b. On: Blue and not blinking

Tape Loaded

Cleaning request

Media error occurred

Slow Flash

c

c. Slow flash: flashes blue for 3-1/2 seconds and off for 1/2 second

Tape access in progress (read/
write)

Cleaning is not completed

N/A

Fast Flash

d

d. Fast flash: flashes blue for 1/4 second and off for 1/4 second

Tape access in progress (other)

N/A

N/A

All Flash

e

e. All LEDs flashing: all flash blue for 1/4 second and off for 1 second

Hardware error occurred