debug HDD performance on Ubuntu server


we got a following system running as file server:

Ubuntu server

Intel SE7230NH1-E

Intel SRCU-42E 512MB PCIe SCSI controller

The problem is as follows:


Timing cached reads: 2258 MB in 2.00 seconds = 1129.32 MB/sec

Timing buffered disk reads: 478 MB in 3.01 seconds = 158.65 MB/sec


Timing cached reads: 2202 MB in 2.00 seconds = 1101.75 MB/sec

Timing buffered disk reads: 106 MB in 3.05 seconds = 34.72 MB/sec

You may recognise the difference :)

sdb is a stripped RAID array

sdc is mirrored, but that does not really explain such poor performance

there are 4 physical 10krpm drives

sdc is each 8GB on drive1 and drive2

sdb has the rest of drive1, drive2 and complete drive3 and drive4 as one stripped array

So the task is to get this fixed.

Happy bidding and just ask for more info if you need more.

Contact for feedback during project can be skype, msn, phone landline or mail.

You may either specify a fixed price or the hourly charge.

Please put in your comment which of those you is what you bid. (bids that don't include this info will be deleted)

We need a invoice with a VAT ID -> no students and private bids (no invoice, no money)

Kemahiran: Sistem Admin

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Tentang Majikan:
( 7 ulasan ) Praha 7, Czech Republic

ID Projek: #366228