| Alfred Falk 2007-01-24, 7:13 pm |
| "markm75" <markm75c@msn.com> wrote in
news:1169585799.172845.211910@l53g2000cwa.googlegroups.com:
>
> markm75 wrote:
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>
> Also forgot.. I'm not sure what SAS refers to at this point.. the
> controller says it has a mini sas connector.. I'm assuming this is
> Serial Attached Storage.. Is this type of HD supposed to replace
> SATA's eventually? I dont see much bigger capacity than 146gb out
> there, not to mention the homebuilt server just says it has mini sas
> ability.. the drive bays are SATA, not sure what benefit this would
> be...
SAS = Serial Attached Scsi. Analogous to SATA = Serial ATA
SAS connector are similar to SATA connectors but, mercifully, not the
same. SCSI disks generally have lower capacity (but higher speed) than
ATA disks.
NAS = Network Attached Storage. Essentially a file server.
SAN = Storage Area Network. A SAN is used to attach storage devices to
servers. Traditionally uses FiberChannel for network, but now we can
use iSCSI which provides SCSI protocol over TCP/IP on Ethernet.
Essentially, storage devices on SANs look like disk or tape drives to
the servers. Very different from a NAS. Some NAS devices these days also
provide SAN LUNs in addition to serving files.
--
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A L B E R T A Alfred Falk falk@arc.ab.ca
R E S E A R C H Information Systems Dept (780)450-5185
C O U N C I L 250 Karl Clark Road
Edmonton, Alberta, Canada
http://www.arc.ab.ca/ T6N 1E4
http://outside.arc.ab.ca/staff/falk/
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