IBM E16RMLL-I Implementation Guide - Page 262
Defining a sequential access tape storage pool
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Tivoli Storage Manager has two types of storage pools: Primary storage pools Copy storage pools A primary storage pool can use random access storage (DISK device class) or sequential access storage (tape, optical, or file device classes). A copy storage pool can use only sequential access storage. You can define your storage pools in any order. However, it is easier to first create the pools that will be pointed to by others. 6.3.1 Defining a sequential access tape storage pool Define a primary tape storage pool using the define stgpool command with your defined device class (LTO2-DC in our case). Important options are: MAXSCRatch: This is the number of scratch tapes that the storage pool can use before it reports that it is full. For automatic libraries, set MAXSCRatch to a large number (for example, 1,000,000) to avoid the server stopping when the storage pool is "full." For manual libraries with a small capacity, set MAXSCRatch to a more realistic number. REClaim: This is the percentage of empty space on a tape volume that will cause the server to try to consolidate the remaining data to another volume. Set REClaim to 100 to disable reclamation. This requires scheduled reclamation for the storage pool. COLlocate: This specifies whether the server tries to keep data from a client, group of clients, or client file spaces on as few tapes as possible (known as collocation). Collocation reduces the number of tapes required to perform restore operations, but will increase the number of tapes required to store client data. RECLAIMSTGpool: If your library has only one drive, you will need another primary sequential storage pool to permit reclamation. Note that we do not recommend single drive configurations for production systems, as discussed in 2.9.3, "Number of tape drives" on page 52. Example 6-9 defines a primary sequential tape pool. Example 6-9 Defining a primary sequential tape pool tsm: ATLANTIC>define stgpool tapedata LTO2-DC description="Primary tape pool" reclaim=100 maxscratch=1000000 collocate=node ANR2200I Storage pool TAPEDATA defined (device class LTO2-DC). tsm: ATLANTIC>q stgp Storage Device Estimated Pct Pct High Low Next Storage 232 IBM Tivoli Storage Manager Implementation Guide
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