+ NASA Home + Ames Home + Sitemap + Staff Directory +Home HIGH END SYSTEMS + Pleiades + Columbia + Schirra ARCHIVAL STORAGE SYSTEM The NAS high-end computing environment includes a 25-petabyte mass storage system that allows our scientific and engineering users to archive and retrieve important results quickly, reliably, and securely. Data stored on RAID is migrated to tapes as needed. Copies of users' data are written to two separate tape media in silos located in two different buildings. Data migration (disk-to-tape) and de-migration (tape-to-disk) are managed by SGI's Data Migration Facility (DMF) and Tape Management Facility (TMF). NAS storage experts provide custom training to help users efficiently manage their large datasets. Archival Storage System Facts System Architecture SGI Altix 4700 "Lou1" 32 Processors 64GB of Memory 65TB (raw) locally attached FibreChannel RAID SGI Altix 4700 "Lou2" 64 Processors 128GB of Memory 175TB (raw) locally attached SATA RAID SGI Altix 4700 "Lou3" 32 Processors 64GB of Memory 65TB (raw) locally attached FibreChannel RAID Attached to Columbia's SGI CXFS Storage Area Network The archive systems, Lou1 and Lou2, mount filesystems from Columbia's SGI CXFS Storage Area Network. This allows file transfers from the compute servers to Mass Storage of up to 500MB/s. Sun StorageTek (STK) tape storage - 25PB maximum capacity 10 library storage modules (5K slots each) 20 STK T10K tape drives (500GB media) 10 STK 9940B tape drives (200GB media) 10 STK 9840 tape drives (20GB media) 4.5PB current unique data stored SGI Data Migration Facility and Tape Management Facility ADDITIONAL INFORMATION + Getting an account at NAS + Storage Documentation + Feedback + Site Help + NASA Privacy Statement, Disclaimer, and Accessibility Certification Editor: Jill Dunbar Webmaster: John Hardman NASA Official: Rupak Biswas + Contact NAS Last Updated: August 27, 2009