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Old September 5th 07, 06:04 PM posted to comp.arch.storage
Fondazione Distrofici Onlus
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Posts: 3
Default Adaptec 2810SA extremely fast or extremely slow?

Hi, sorry for bad english..
I've got a Tyan Thunder S2885 and an Adaptec 2810SA, configured as
follows:

- 5 Maxtor 300gb hard disks on adaptec card
- 1 Maxtor 160gb hard disk attached to the motherboard
- 3 RAID5 volumes (partitions) on adaptec card
- 1 partition 1TB
- 1 partition 160 GB
- 1 partition 5GB

After executing a benchmark test, the results surprised me...

All the volumes of the Adaptec card showed the same results:
__________________________________________________ __________
READING
- sequential reading (large files): 133 MB/s
- random reading (large files): 103 MB/s

- sequential reading (small files): 59 MB/s
- random reading (small files): 54 MB/s

__________________________________________________ __________
WRITING
- sequential writing (large files): 10 MB/s
- random writing (large files): 8 MB/s

- sequential writing (small files): 7 MB/s
- random writing (small files): 8 MB/s

Aren't these results strange for what is said to be an "ideal cost-
effective solution for applications where high levels of sustained
read and write performance are required, including video streaming,
web content, reference data and fixed content storage" ??

What can I do?? I am writing an application that does video
acquisition in real time...

Thanks a lot,
Marco