vi Barracuda 1 and 2 Product Manual, Rev. C
7.0 Physical/electricalspecifications ................................................................................... 31
7.1 AC power requirements ............................................................................................ 31
7.2 DC power requirements ............................................................................................ 31
7.2.1 Conducted noise immunity ............................................................................ 33
7.2.2 Power sequencing......................................................................................... 33
7.2.3 12V current profile ......................................................................................... 34
7.3 Heat/powerdissipation.............................................................................................. 35
7.4 Environmentallimits.................................................................................................. 35
7.4.1 Temperature.................................................................................................. 35
7.4.2 Relative humidity ........................................................................................... 35
7.4.3 Effective altitude (sea level)........................................................................... 36
7.4.4 Shock and vibration ....................................................................................... 36
7.4.5 Air cleanliness ............................................................................................... 37
7.4.6 Acoustics....................................................................................................... 37
7.5 Electromagneticcompatibility.................................................................................... 37
7.6 Mechanical specifications ......................................................................................... 38
7.6.1 Drive orientation ............................................................................................ 40
7.6.2 Cooling .......................................................................................................... 40
8.0 Mediacharacteristics ...................................................................................................... 41
8.1 Media description...................................................................................................... 41
9.0 Defect and error management ........................................................................................ 43
9.1 Defects and errors .................................................................................................... 43
10.0 Option/configuration headers......................................................................................... 45
10.1 Drive ID/option select headers .................................................................................. 45
10.1.1 ST11950N/ND and ST12550N/ND configuration ........................................... 45
10.1.2 ST11950W/WD and ST12550W/WD configuration ........................................ 48
10.2 Synchronized spindles interface ............................................................................... 50
10.2.1 Electrical description...................................................................................... 50
10.3 Grounding................................................................................................................. 52
11.0 Interface requirements .................................................................................................... 53
11.1 General description................................................................................................... 53
11.2 SCSI interface messages supported......................................................................... 53
11.3 SCSI interface commands supported........................................................................ 54
11.3.1 Inquiry data.................................................................................................... 56
11.3.2 Mode sense data ........................................................................................... 56
11.4 SCSI bus conditions and miscellaneous features supported..................................... 61
11.5 Synchronous data transfer........................................................................................ 62
