Re: HSM utilization of 3490 emulated 9840D tape?
snip It would appear both tapes have the same amount of data. /snip Dave, Not only does it look like both tapes have the same amount of data but the 9840D only used 189 feet of the 825 feet available, about 23%. of the media. Obviously there's a reason for you to keep the 3490 emulation but it seems like that's max'ed with the 9840A. No chance of changing to 3590 'emulation'? As you know better that I, getting info from STK can be difficult, especially if there's no 'good' answer. jack Jack Kelly 202-502-2390 (Office) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
HSM utilization of 3490 emulated 9840D tape?
I'm currently migrating HSM data from 9840As to 9840Ds. Given the increase in capacity I would have expected 3:1 consolidation ratio. That doesn't seem to be the case. I did increase the OCDS Maxlrecl to 6144 as recommended. Setsysextendedttoc(y) is also implemented. Tapeutilizationwas increased to 8000 from 2200 per STK's recommendation. Unittype(3490) is specified, which according to the manual nullifies use of the Capacitymode parameter.. However the number of valid blocks has only increased by a relatively small amount. Following is 9840A VOLSERUNITVOL REUSE VALID PCTVOL NAME TYPE CAPACITYBLKS VALID STATUS H000973490 SPILL 0003455900 0003890039 100FULL 9840D E202253490 SPILL 0003455900 0004193904 100FULL That's only a 10% increase. Am I missing something here? Thanks in advance for any advice. Thank You, Dave O'Brien NIHContractor -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM utilization of 3490 emulated 9840D tape?
David, I do believe that you hit it on the head with the 'Unittype(3490) is specified, which according to the manual nullifies use of the Capacitymode parameter..' observation. I know that could not get 9840A to qualify for Capacitymode but I'm not surprise that STK hasn't bellied up to responding. Since you've mentioned HSM BACKUP tapes, there should be no doubt about 'take away' being involved. Have you looked at what FATS says about the tape usage? Since we are getting away from the STK 'emulation' , we haven't seen any discrepences. Jack Kelly 202-502-2390 (Office) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: HSM utilization of 3490 emulated 9840D tape?
Jack, Took your advice and ran Fatar Analyze against both 9840A and 9840D HSM backups which are 100% full. Results follow: 9840A CHARACTERISTICS OF THE TAPE TO BE ANALYZED UNIT DEVICE SERIAL MFR CARTRIDGE EMULATING 0536 9840 H00116 STK 20 GB 3490 FINAL TOTALS FILES READ BLOCKS READ BYTES READ FEET READ TEMP ERRS PERM ERRS 1 419391768713136128 0 0 IDRC(COMPACTED) 10206517909469184 726 9840D CHARACTERISTICS OF THE TAPE TO BE ANALYZED UNIT DEVICE SERIAL MFR CARTRIDGE EMULATING 2503 9840DE20677 STK 75 GB 3490 FINAL TOTALS FILES READ BLOCKS READ BYTES READ FEET READ TEMP ERRS PERM ERRS 1 419391768713136128 0 0 IDRC (COMPACTED) 2073417939517440 189 It would appear both tapes have the same amount of data. Any ideas? Thank You, Dave O'Brien NIH Contractor From: John Kelly [john_j_ke...@ao.uscourts.gov] Sent: Friday, March 12, 2010 12:02 PM To: IBM-MAIN@bama.ua.edu Subject: Re: HSM utilization of 3490 emulated 9840D tape? David, I do believe that you hit it on the head with the 'Unittype(3490) is specified, which according to the manual nullifies use of the Capacitymode parameter..' observation. I know that could not get 9840A to qualify for Capacitymode but I'm not surprise that STK hasn't bellied up to responding. Since you've mentioned HSM BACKUP tapes, there should be no doubt about 'take away' being involved. Have you looked at what FATS says about the tape usage? Since we are getting away from the STK 'emulation' , we haven't seen any discrepences. Jack Kelly 202-502-2390 (Office) -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
