Dell PowerVault 120T DDS4 User Manual

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3-4 Dell PowerVaullt 120T DDS4 Autoloader User's GuideOperator ActionLoading and Unloading DefinitionIn order to clarify the load and unload sequences, the following definitions are used.Unloaded: A cartridge is unloaded when it is moved from the drive back to the magazine.In this state the drive is offline; the host can not perform any operation which wouldcause tape motion, that is, write, read, and space commands.Semi-loaded: A cartridge is semi-loaded when the cartridge is in the drive mechanismbut the tape is not threaded around the head. The drive is offline in this state. The hostmay issue the LOAD command to take the drive online. It can also execute anydiagnostic command that does not access the tape.Loaded: The tape is loaded at the end of the load sequence. The drive is then online; allcommands can be executed, including those which set configurations or run diagnostictests.MagazineThe autoloader has 8 slots. We recommend that all 8 cartridges are inserted in themagazine, but the autoloader can operate even if the magazine is not full. The followingcartridge numbers(1, 7, 8) are effective for operation. If you place incorrect numbers ofcartridges into the magazine(not 1, 7, 8 cartridges), the autoloader automatically ejectsthe magazine.Eight Cartridges SettingIt is recommended that 8 data cartridges are placed in the magazine. Slot "1" through "8"are reserved for data cartridges, see Figure 3-3.Depending on application software, slot "8" can also be used for a cleaning cartridge.Slots "1" through "7" are accessed sequentially, while slot "8" can be accessed directly.Figure 3-3. Eight Cartridge Setting PositionOne Cartridge SettingThe cartridge should be placed to slot "8".Upon insertion of the magazine, the autoloader will perform a scanning check for tapes.If the autoloader detects an empty slot in the magazine, other than slot "8", theautoloader will enter Single Tape mode. The autoloader always function regardless ofslot "8" being empty or full. The magazine will be ejected if slot "8" is empty and there isalso an empty slot between slot "1" though "7", see Figure 3-4.