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Storage Server (datastore1) |
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2x Origin 350
- 2x MIPS 800Mhz cpus
- 2GB RAM
- 73GB SCSI drives
- DVD-ROM
- 3x Gigabit Ethernet
- dual port fibre channel HBAs
- systems are connected together with SGI Numalink cables to provide a single system of 4 cpus, 8GB RAM and mirrored hard drives
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Disk systems |
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2x SGI TP9300S
- Dual active-active RAID controllers
- 2x 2Gbps FC host connections per controller
- 2Gbps FC loop connecting controllers to drives
- total of 11 drive expansion trays
- 14x 250GB SATA drives per tray providing unconfigured capacity of 37TB
- management through 10/100 ethernet connection to each controller
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Tape Library |
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ADIC Scalar i2000
- 6x LTO2 tape drives (expandable to 96)
- 900 tape drive slots licenced (expandable to over 3,000)
- 200GB uncompressed data capacity per tape
- data throughput of 35MB/s (without compression) per drive
- 4x FC connections to SAN
- remote management through 10/100 ethernet connection
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SAN switches |
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2x Brocade Silkworm 3250
- 8 port FC switches
- connected to provide redundant paths between all components
- remote management through 10/100 ethernet connection
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SAN Connectivity
All of the components are connected on a 2Gbps Fibre Channel SAN (Storage Area Network) with at least 2 independent paths between each device as shown below
Filesystems
Most of the user filesystems use eight drives in a 7+1 RAID5 configuration on the RAID controller system which has eight trays of drives. This provides a filesystem of 1.6TB and also, by using one drive from each expansion tray, it is resilient against hardware failure of a complete tray.
Filesystems are then generally configured as hierarchical storage systems meaning that, once the disks are full, data is migrated automatically to tape providing additional capacity.
This is explained further in the software section.
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