content_image/992468.jpg
Similarly, you might need to start a manual inventory if the host application software indicates that a problem exists with the library inventory. 

The TS4500 tape library provides two inventory options, as shown in Figure 4-152. 

<img src='content_image/992468.jpg'>

Select the type of scan that is required: 

GLYPH<SM590000> Scan tier 0 and tier 1 

Use this option when a faster inventory is preferred. This option scans other tiers only if a discrepancy is identified. 

GLYPH<SM590000> Scan all tiers 

Use this option when a full library inventory is required. This option is not concurrent, and it can last many hours, depending on the number of cartridges in the library. 

Note:  The depth of a cartridge location in a HD slot is known as a tier . Frame drive side slots are for the cartridges that are immediately accessible in an HD slot (these are Tier 1 cartridges). Behind that is Tier 2, and so on. The maximum tier in an LTO HD slot is Tier 5. The maximum tier in a 3592 HD slot is Tier 4. The single slots on the door-side of a frame are referred to as Tier 0 slots. 

When no frame is selected, select Inventory  from the Actions menu to start an inventory of the library. When a frame is selected, the Inventory option inventories only that frame. Right-click any frame and select  Actions →  Inventory  to inventory only that frame. 

You can inventory a single frame by selecting it and then clicking Actions →  Inventory . If you do not select a frame, all frames are inventoried. 

## Inventory all tiers 

In a high-density (HD) library, a standard inventory is a scan of tier 0 and tier 1. However, at certain times, it is necessary to inventory all tiers. This operation takes more time because it requires moving the cartridges within an HD slot to scan each bar code. For all inventory operations, tier 2 and higher in an HD slot are only scanned when one of the following changes occurs: 

GLYPH<SM590000> A tier 1 cartridge bar code label changed, which is detected during inventory. Only the slots for which the tier 1 label changed are audited. 

GLYPH<SM590000> Enough tier 1 bar code labels changed in a column to warrant an audit of the entire column of HD slots. 

GLYPH<SM590000> An “Inventory all tiers” is requested through the TS4500 management GUI. 

