Difference between UNIX and Windows Disk storage Post: 303016276

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Top Forums UNIX for Beginners Questions & Answers Difference between UNIX and Windows Disk storage Post 303016276 by bakunin on Monday 23rd of April 2018 04:12:39 PM

04-23-2018

Registered User

Quote:

Originally Posted by MadeInGermany

Meanwhile the higher integration hides the complexity, and the price gap between SAS and SATA disks should heavily shrink - but does not. It might be the sales strategy of the big manufactures, or even a cartel...

Not entirely. The defining quality of a disk is not the connection (SCSI, FC, SATA) but the MTBF (mean time between failure, the average time the disk will work before having to be replaced) the disk is designed to handle. The $59.99/TB disk sold at the Penny-shop will perhaps not do more than 20000h (~3years) MTBF at all. Data center quality disks have MTBFs of 100000h and more. If you have a DC with, say, some thousands of disks in it you will apppreciate the fact that only 5 disks a week give up instead of 50.

Because SCSI is traditionally used in professional equipment (read: data centre equipment) they tend to be somewhat more expensive - not because of the SCSI, but because they are usually better quality too.

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LEARN ABOUT BSD

diskscan

diskscan(1M)						  System Administration Commands					      diskscan(1M)

NAME

       diskscan - perform surface analysis

SYNOPSIS

       diskscan [-W] [-n] [-y] raw_device

DESCRIPTION

       diskscan  is used by the system administrator to perform surface analysis on a portion of a hard disk. The disk portion may be a raw parti-
       tion or slice; it is identified using its raw device name. By default, the specified portion of the  disk  is  read  (non-destructive)  and
       errors  reported  on standard error. In addition, a progress report is printed on standard out. The list of bad blocks should be saved in a
       file and later fed into addbadsec(1M), which will remap them.

OPTIONS

       The following options are supported:

       -n	Causes	diskscan to suppress linefeeds when printing progress information on standard out.

       -W	Causes diskscan to perform write and read surface analysis. This type of surface analysis is destructive  and  should  be  invoked
		with caution.

       -y	Causes	diskscan to suppress the warning regarding destruction of existing data that is issued when  -W is used.

OPERANDS

       The following operands are supported:

       raw_device      The address of the disk drive (see FILES).

FILES

       The raw device should be /dev/rdsk/c?[t?]d?[ps]?. See disks(1M) for an explanation of SCSI and IDE device naming conventions.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Architecture		     |x86			   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       addbadsec(1M), disks(1M), fdisk(1M), fmthard(1M), format(1M), attributes(5)

NOTES

       The  format(1M)	utility is available to format, label, analyze, and repair SCSI disks. This utility is included with the diskscan, addbad-
       sec(1M), fdisk(1M), and fmthard(1M) commands available for x86. To format an IDE disk, use the  DOS format utility; however, to label, ana-
       lyze, or repair IDE disks on x86 systems, use the Solaris format(1M) utility.

SunOS 5.10							    24 Feb 1998 						      diskscan(1M)