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There are some useful graphs in this whitepaper, the controller is a bit later than the P400 but the values are pretty much the same as it's the disk speed that matters. <a href="http://tinyurl.com/m9j7c9m" rel="ugc">http://tinyurl.com/m9j7c9m</a>&nbsp;(it explains the RAID 5 write algorithm too).
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There are some useful graphs in this whitepaper, the controller is a bit later than the P400 but the values are pretty much the same as it's the disk speed that matters. http://tinyurl.com/m9j7c9m [http://tinyurl.com/m9j7c9m] (it explains the RAID 5 write algorithm too).

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In the article, &quot;<br />
Each physical link can support a maixum bandwidth : 6 GiB/s (600 MiB/s) &nbsp;when 6 GiB/s SAS drives are attached&quot;<br />
<br />
Does it mean 6 GiB/s link can deliver 600 MBytes/s of data, with 6 Gigabit/s of SAS ports ? For MiB/s, is it the same as MB/s ?<br />
<br />
Tks
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In the article, "
Each physical link can support a maixum bandwidth : 6 GiB/s (600 MiB/s)  when 6 GiB/s SAS drives are attached"

Does it mean 6 GiB/s link can deliver 600 MBytes/s of data, with 6 Gigabit/s of SAS ports ? For MiB/s, is it the same as MB/s ?

Tks

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<div class="content wysiwyg-content">
For a HP Proliant G5 server with 8 x 146GB 10K RAID-5 disk, how to estimate the MB/s for read &amp;&nbsp;write ? How to estimate the IOPS ? <br />
<br />
Tks
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For a HP Proliant G5 server with 8 x 146GB 10K RAID-5 disk, how to estimate the MB/s for read & write ? How to estimate the IOPS ? 

Tks

Disk performance for HP Proliant G5 Server

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. In addition to local storage devices like CD and DVD readers, hard drives and flash drives, solid state drives can hold enormous amounts of data in a very small device. Cloud services and other new forms of remote storage also add to the capacity of devices and their ability to access more data without building additional data storage into a device.

Storage

Servers are computing devices that are similar to desktop computers in that they have the same basic components, but are significantly different in size, configuration and purpose. Servers are usually accessed over a network, and many run unattended, without a computer monitor, input device, audio hardware or USB interfaces. Many servers do not have a graphical user interface (GUI), and are configured and managed remotely. Servers typically include hardware redundancy such as dual power supplies, RAID disk systems, and ECC memory, along with extensive pre-boot memory testing and verification. Critical components might be hot swappable, and to guard against overheating, servers might have more powerful fans or use water cooling.