Chapter 1. Chassis Tour
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Chapter 1. Chassis Tour

This chapter discusses the configurations, controls and connectors visible from the front, rear, and inside of the Vault L storage box.

Configurations

The Vault L (Figure 1-1) is available in two configurations:

  • a differential storage box

  • a mixed-channel storage box that supports both single-ended and differential drives

Note: You can distinguish between a differential and a mixed-channel Vault L storage box by looking at the back of the chassis. The mixed-channel Vault l has an
SE TERM: A (singled-ended) label designator, and the differential Vault L does not. See also Figure 1-3 and Figure 1-4.

The Vault L storage box supports 8-bit and 16-bit differential SCSI drives and 8-bit single-ended SCSI drives, but does not currently support 16-bit, single-ended drives.

Front View

Figure 1-1 shows the front of the Vault L storage box.

Figure 1-1. Vault L Storage Box (Front View)

Figure 1-1 Vault L Storage Box (Front View)

The following major components are visible on the front of the Vault L storage box:

Drive door 

opens and closes using two quarter-turn. Open the drive door by pushing the knob in and turning it counter-clockwise to open. Close the door by pushing the knob in and turning clockwise.

Caution: The drive door must be in place during operation to comply with FCC regulations and to ensure proper air flow through the drive box.

On/Off switch 

controls power to all drives. This green switch illuminates when turned on.

Drive shelves 

house the SCSI drives and drive sled. The shelves are removable to accommodate full-height drives. See Section 3.2, "Removing a Drive Shelf to Install a Full-Height Drive," in Chapter 3, "Installation," later in this guide.

Note: The full-height drives require two half-height slots.

Figure 1-2 shows the front of the Vault L storage box with the drive door open.

Figure 1-2. Vault L Storage Box, Front View (Drive Door Open)

Figure 1-2 Vault L Storage Box, Front View (Drive Door Open)

Rear View

Figure 1-3 shows the back of the differential-only Vault L storage box. Figure 1-4 shows the back of the mixed-channel Vault L.

Figure 1-3. Vault L Storage Box (Rear View)

Figure 1-3 Vault L Storage Box (Rear View)

Table 1-1 describes the major components on the back of the differential Vault L storage box. Table 1-2 describes the major components on the back of the mixed-channel Vault L storage box.

Table 1-1. Differential Vault L Rear Panel Connectors and Switches

Rear Panel Connector/Switch

Function

SCSI In

provides a 68-pin SCSI-2 differential connector

SCSI Out

provides connection for SCSI termination or a daisy-chain connection to another SCSI device

Voltage Selector

selects between 115 and 230 VAC


Caution: Ensure that the voltage setting matches the power input source voltage. Damage to the Vault L storage box can result if the setting is incorrect.

Table 1-2. Mixed-Channel Vault L Rear Panel Connectors and Switches

Rear Panel Connector/Switch

Function

SCSI In

provides a 68-pin SCSI-2 differential connector

SE TERM: A

provides single-ended SCSI termination

DIFF Out: B

provides connection for SCSI termination or a daisy-chain connection to another differential SCSI device

Voltage Selector

selects between 115 and 230 VAC


Caution: Ensure that the voltage setting matches the power input source voltage. Damage to the Vault L storage box can result if the setting is incorrect.

Figure 1-4. Mixed-Channel Vault L Storage Box (Rear View)

Figure 1-4 Mixed-Channel Vault L Storage Box (Rear View)

Note: The mixed-channel Vault L storage box provides connectivity to both single-ended and differential drives. The mixed-channel Vault L has a connector called
SE TERM: A; the differential Vault L does have this connector.

Inside View

These parts are located inside the Vault L (see Figure 1-5 and Figure 1-6):

Power supply 

provides 5 and 12 volts of power to all drives and fans in the box.

SCSI backplane 


enables connection to SCSI devices. This backplane is the same in both mixed-channel and differential Vault L storage boxes.

Figure 1-7 shows the front view of the SCSI backplane. Note the pair of green LEDs associated with each drive bay. When illuminated, the top LED signifies that the drive is receiving 5 volts, and the lower LED signifies that the drive is receiving 12 volts.

Figure 1-8 shows the rear view of the SCSI backplane and the required jumper settings.

Differential converter board 


converts the differential SCSI signals from the IO4 to allow connection to single-ended devices.

Note: The differential converter board is present only in the mixed-channel Vault L.

Figure 1-5. Differential Vault L (Inside Box)

Figure 1-5 Differential Vault L (Inside Box)

Figure 1-6. Mixed-Channel Vault L (Inside Box)

Figure 1-6 Mixed-Channel Vault L (Inside Box)

The SCSI backplane enables connection to SCSI devices. Figure 1-7 shows the front view of the SCSI backplane.

Figure 1-7. SCSI Backplane (Front View)

Figure 1-7 SCSI Backplane (Front View)

Note the pair of green LEDs associated with each drive bay. When illuminated, the top LED signifies that the drive is receiving 5 volts, and the lower LED signifies that the drive is receiving 12 volts.

Figure 1-8. SCSI Backplane (Rear View)

Figure 1-8 SCSI Backplane (Rear View)

Caution: Note the different jumper settings for mixed-channel and differential-only SCSI operation. These jumpers must be correctly set for proper drive operation.

Differential-to-Single-ended SCSI Converter Boards

The mixed-channel Vault L storage box can use three versions of the converter board. Two are manufactured by Rancho and the third board is produced by NCR. If you are replacing a converter board in the Vault L, ensure that the replacement board is jumpered according to Figure 1-9 through Figure 1-11.

Figure 1-9. NCR Differential Converter Board Jumpering

Figure 1-9 NCR Differential Converter Board Jumpering

Figure 1-10. Rancho Differential Converter Board Jumpering (Two Jumper Version)

Figure 1-10 Rancho Differential Converter Board Jumpering (Two Jumper Version)

Figure 1-11. Rancho Differential Converter Board Jumpering (Three Jumper Version)

Figure 1-11 Rancho Differential Converter Board Jumpering (Three Jumper Version)

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