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What are the Benefits of Server Hardware?

Why are there separate product lines for Server and Desktop hardware. For example, Xeon vs Pentium, IDE vs SCSI hard drives.

What are the principles of server hardware selection that led to these product lines

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I know one main difference out there is servers usually have support for ECC (Error Correcting Code). This allows errors in the RAM to be detected and corrected.

Also, please correct me if I'm wrong, but I believe that IDE and SCSI are being phased out in favor of the faster SATA2 interface.

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  • yes I havent seen a recent server with scsi disks. but many older machines have those
    – Midhat
    May 21, 2011 at 17:51
  • SATA for IDE and SAS for SCSI, both are basically the extensions/advancements of the respective IDE and SCSI technologies.
    – user48838
    May 21, 2011 at 17:56
  • There are also redundant/hot-swappable power supplies as well as other hot-pluggable components (expansion cards, processors, memory, etc.) which make the server "beefier" operationally. Intel also tends to disable their more advanced processor features for their "desktop" lines.
    – user48838
    May 21, 2011 at 18:00
  • @Midhat and @Bandit - SCSI is not being phased out. Old parallel SCSI interconnects are being phased out in favor of serial attached SCSI a.k.a. SAS. The SCSI command set still has a ton of advantages over the ATA command set, on which both IDE and SATA are based.
    – EEAA
    May 21, 2011 at 22:21

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