The following is how TSM handles tapes, I assume VTL would be the same.
Essentially the estimated capacity is assigned to the tape when it is allocated to a stgpool and loaded into the drive. This value is determined from the device class "Est/Max Capacity (MB)" TSM will not update the capacity again untill it has reached the End Of Tape. I have put in an rfe 31662 so that TSM would (better) estimate tape capacity. http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=31662 The best solution would be to align the estimated capacity for the device class with the actual data size you expect to fit on a tape. Grant On 06/08/14 15:37, Grigori Solonovitch wrote:
TSM 6.3.3.100 VTL on Data Domain I have found wrong "Estimated Capacity:" for primary storage pools on VTL ( for example, for pool with 128 * 64 = 8192GB it gives estimated capacity 18,191 GB in "query stg", but it is impossible). As a result storage pool utilization is calculated wrongly as well. What is the source of problem? Data Domain deduplication or something else? Shall I ignore this problem? Grigori Solonovitch, Senior Systems Architect, IT, Ahli United Bank Kuwait, www.ahliunited.com.kw ________________________________ CONFIDENTIALITY AND WAIVER: The information contained in this electronic mail message and any attachments hereto may be legally privileged and confidential. The information is intended only for the recipient(s) named in this message. If you are not the intended recipient you are notified that any use, disclosure, copying or distribution is prohibited. If you have received this in error please contact the sender and delete this message and any attachments from your computer system. We do not guarantee that this message or any attachment to it is secure or free from errors, computer viruses or other conditions that may damage or interfere with data, hardware or software. Please consider the environment before printing this Email.
