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Raw data copy

Raw data copy. Currently we have 3.6 TB raw data (1.5 TB LEP1, > 2TB LEP2) 2 copies, both on DLT2000 Obsolete tape medium, no long term support, no robotics Written at Echenevex in Vax native format Can only be read on VMS ~Inaccessible after 2001

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Raw data copy

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  1. Raw data copy • Currently we have • 3.6 TB raw data (1.5 TB LEP1, > 2TB LEP2) • 2 copies, both on DLT2000 • Obsolete tape medium, no long term support, no robotics • Written at Echenevex in Vax native format • Can only be read on VMS • ~Inaccessible after 2001 • Make a copy on modern media, in EPIO format • IBM 9840, robotics, readable on Unix • As accessible as all other Aleph datasets • LEP 1 copy has started on ALWS • 1995 done, 1994 ongoing @25GB/day. Done in ~2 months • LEP 2 copy will be done during reprocessing

  2. HPUX support • No new investment in CERN CSF since 1995 • Has become small fraction of CPU available to Aleph • Recently used only for LEP1 productions • Not used since Easter 2000 • Scheduled for removal end-2002 • IN2P3 Lyon • Future of HP uncertain, no longer cost effective to maintain • Proposal: • No new LEP2 productions on HP • No new versions of Aleph software on HP after 2000

  3. VMS support • VMS is essential for online, Falcon, raw data • Online use finishes this year • Falcon used in 2001 for LEP2 reprocessing • Raw data will be all in EPIO format after LEP2 reprocessing • Drop VMS support for production/analysis end 2001 • VMS needed also for: • ALNEWS • Book-keeping info from online (runlog, logbook, time charts etc.) • Keep minimal system after 2001: • One server machine, a few important disks • Logins tolerated but discouraged (no backup of home directories) • “Beat’s private machine for reading mail”

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