FS: 20 gig SCSI 2 backup - HP Surestore Optical 20xt.. - Thread - go-pugleaf

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1 total messages Started by GRAFcomm Thu, 24 Jun 1999 00:00

FS: 20 gig SCSI 2 backup - HP Surestore Optical 20xt..

#17452

Author: GRAFcomm
Date: Thu, 24 Jun 1999 00:00

96 lines
3469 bytes



This machine has done hardly anything serious, compare log with the robotics
MTBF of 600,000 swaps.


INFORMATION LOG DETAILS

Drive load count                624
Poweron hours             25253
Total move count            1391
Flip count                         1087
Mailslot rotation count      421


Sensible offers please to:


For further details,  etc.
post@#grafcomm.u-net.com after removing # or
telephone (01283) 517785 or 0780 904 9515


Specifications:

HP Optical Jukebox
Average Disk Exchange Time 12s
HP Optical Drive
Average Seek 25 ms
Short Seek (across 2.2 Mbytes) 6 ms
Average Latency 10 ms
Average Access Time 35 ms
Effective Access Time* 14.5 ms
Rotational Speed 3000 rpm
Data Transfer Rate
(software/system dependent)
        Reads (max. sustained) 3.4 MB/s
        Writes (max. sustained) 1.7 MB/s
        Burst (synchronous) 5 MB/s
        Burst (asynchronous) 3 MB/s
Read/Write Error Rate <1per 1014 bytes
Disk Load/Unload Time
        Load (w/spin-up) 5.5 s (avg)
        Unload (w/spin-down) 3.0 s (avg)
Buffer Size 1 MB
        Read Buffering Read aheads
        Write Buffering Immediate reporting,
write re-ordering
*Results of 1/3 stroke plus latency over 50 MB bandwidth



Height 495.3 mm (19.5 in.)
Width 220 mm (8.7 in.)
Depth 749.3 mm (29.5 in.)
Weight (Net) 20.5 Kg (45.2 lbs.)
Weight (Shipping) 25.4 Kg (56 lbs.)


Safety UL 1950, CSA 950, TUV IEC 950
Emmisions FCC Class "B", CISPR 22, Class "B"
Laser CDRH, IEC 825


MTBF 100,000 hours
MTBF (drive) 600,000 hours
MTBF (robotics) 600,000 swaps
Mean Time to Repair 30 minutes
Preventative Maintenance None required

Temperature
        Operating 10 to 40 C
        Non-Operating (w/o media) -40 to 60C
        Gradient 10C per hour
Humidity
        Operating 10% to 90% RH
        Non-Operating 5% to 95% RH
Shock
      Non-Operating 30 g trapezoidal
Vibration (5 to 500 Hz)
        Operating 0.21 g rms
        Non-Operating (random) 2.09 g rms
        Non-Operating (swept-sine) 0.5 g  (0 to peak)
Acoustic Emmisions
        Operating 61.5 dB
        Idle 47 dB
Power Requirements
        Line Voltage (115 V) 100 to 127 VAC
        Line Voltage (230 V) 200 to 240 VAC
        Line Frequency) 50 to 60 Hz
        Power Consumption 70 W typical
100 W maximum

Interface
        SCSI-2 Single-ended or differential

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