NGAS HW (1):
-Started with 8 slots parallel ATA systems.
-8 x 80 GB storage
capacity per node (640 GB/node, ~1.2 TB compressed).
-Since March 2004 a 24
slot serial ATA system in operation (up to 24 * 400 GB = 9.6 TB/node, 19.2 TB compressed).
-Reduces price per GB.
-More robust HW amongst other due to serial ATA (cleaner
cabling).
-Disk handling easier, more robust disk frames.
-Overall HW stability
(hopefully) better and less intervention needed (TBC).
-Amount of data/CPU
should be balanced to be able to process the data in a limited time.
-TBD when to use new HW in operation at observatory
sites.
-Investigating usage of RAID5 rather then JBOD
disks.
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