How do find hard disk revolutions speed?

Question Posted / franklin

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How do find hard disk revolutions speed?..

Answer / abhishek tyagi

A typical desktop hard disk rotate at 7,200 revolutions per
minute (RPM). A typical server hard disk spin at 10,000 or
15,000 rpm to achieve sequential media transfer speeds. You
can use hard disk model number to obtain disk RPM. For
example, a typical Seagat disk Model # ST373455SS can
provide following information:

* ST - Brand identity
* 3 - Form Factor (3 = 3.5")
* 73 - Disk size / Capacity in GB i.e. 73GB
* 4 - Reserved for future use
* 5 - RPM ( 5 = 15k and 0 = 10K)
* 5 - Generation
* SS - Indicates interface i.e Serial Attached SCSI

How do I find out hard disk model and serial number?

Use any one of the following command from shell prompt to
find out hard disk model number:
$ cat /proc/scsi/scsi
OR use scsi_id command to querys a SCSI device via the SCSI
INQUIRY vital product data (VPD) page 0x80 or 0x83 and uses
the resulting data to generate a value that is unique across
all SCSI devices that properly support page 0x80 or page 0x83.
$ /sbin/scsi_id -g -p 0x80 -s /block/sdd
OR
$ sudo grep -i sdd /var/log/boot.log
OR use sginfo / scsiinfo command from sg3_utiles package, enter:
# sginfo -a /dev/sdd | more

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