Medium Optical Disk (RW551/RW552) Library
6–12
EK–MOL80–SV. B01
Dual-Picker Exchange
Using dual-picker mode, true disk exchanges can occur. The picker gets the
source cartridge from its home slot, moves it to the drive, EXCHANGES the
cartridge with the cartridge in the drive, and then puts the cartridge that was in
the drive in its home slot.
The advantage of using the exchange comes from the ability to spin the drive up
and down simultaneously with other moves. Below is a detailed description of
this type of exchange.
NOTE
Step 1a and 1b occur simultaneously. Step 1b
must complete before Step 2 begins. Step 1b
must complete before Step 4 begins.
Steps 6a and 6b occur at the same time. Both
must complete before step 2 occurs. Step 6a
must complete before Step 7 begins.
1. a) Move to the source slot.
b) Eject the cartridge from the drive(spindown).
2. Grab the cartridge(source) from the slot.
3. Move to the drive(destl).
4. Grab the cartridge from the drive.
5. Insert the cartridge(source) into the drive.
6. a) Move to the cartridge's home slot(dest2).
b) Spinup the drive.
7. Put the cartridge into the slot.
The exchange is performed by the following command:
Exchange source destl dest2.
The drive exchange time is the time it takes to execute steps 1 through 7, but
there is no waiting for the drive to spin up. The drive down time is the time it
takes to execute steps 1 through 6b, waiting for the spinup to complete on step
6b. Several steps occur in parallel during a dual-picker exchange. First, while the
picker is getting the source cartridge, the drive is spinning down and ejecting.
Second, while the picker is putting away the cartridge that was in the drive, the
drive is spinning up.
Содержание RW551
Страница 27: ...Medium Optical Disk RW551 RW552 Library 3 2 EK MOL80 SV B01 Figure 3 2 Rear Panel SCSI Connect...
Страница 34: ...Chapter 3 Product Configuration and Operation EK MOL80 SV B01 3 9 Figure 3 4 Control Panel Menu Tree...
Страница 92: ...end...
Страница 139: ...Chapter 5 Removal and Replacement EK MOL80 SV B01 5 47 Figure 5 49 Jukebox Exploded View 1 of 2...
Страница 140: ...Medium Optical Disk RW551 RW552 Library 5 48 EK MOL80 SV B01 Figure 5 49 Jukebox Exploded View 2 of 2...
Страница 141: ...Chapter 5 Removal and Replacement EK MOL80 SV B01 5 49 Figure 5 50 Jukebox Power Harness...
Страница 142: ...Medium Optical Disk RW551 RW552 Library 5 50 EK MOL80 SV B01 Figure 5 51 Jukebox Pulley and Rope Diagram...
Страница 166: ...Chapter 6 Theory of Operation EK MOL80 SV B01 6 23 Figure 6 10 User Zone Layout for 1 3 Gbyte Media g 1...
Страница 167: ...Medium Optical Disk RW551 RW552 Library 6 24 EK MOL80 SV B01 Figure 6 11 User Zone Layout for 1 3 Gbyte g 16...
Страница 168: ...Chapter 6 Theory of Operation EK MOL80 SV B01 6 25 Figure 6 12 User Zone Layout for 2 6 Gbyte Media 1 024 bytes sector...
