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Full Discussion: One StorageTek 6140 vs Two (2) 2540 's?
Operating Systems Solaris One StorageTek 6140 vs Two (2) 2540 's? Post 302197482 by lowbyte on Wednesday 21st of May 2008 04:25:02 AM
Old 05-21-2008
Hey all,

another point for the discussion is how many controllers in the storage you plan.
Both 2540 and 6140 can be ordered with one or two controllers, if you use two
controllers in the 2540 you may be faster than a 6140 with one controller. Otherwise
the 6140 will be faster. The internal design of the boxes differs a little bit, cause the
2540 based on SAS-Disks, there is no second line to the disk backplane, so the
second controller is only for failover, multipathing will not speed up the box.
The 6140 has two pathes to the disk backplane, so every controller has its own
path, this will increase the speed by multipathing.

A 2540 with a 2501 expansion tray will not double the performance, the IOPs and
MB thrugh is limited by the controller.
Its a very good idea, get the boxes via try and buy and test yourself.

Happy testing
lowbyte
 

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LEARN ABOUT NETBSD

icp

ICP(4)							   BSD Kernel Interfaces Manual 						    ICP(4)

NAME

     icp -- ICP-Vortex and Intel Storage RAID driver

SYNOPSIS

     icp* at pci? dev ? function ?
     ld* at icp? unit ?
     icpsp* at icp? unit ?
     scsibus* at icpsp?

DESCRIPTION

     The icp driver provides support for the newer (post 1997) ICP-Vortex GDT and Intel Storage RAID controllers.

     The ld driver provides access to logical devices (disk arrays) presented by the controller.  The icpsp driver provides direct access to other
     SCSI devices attached to the controller, such as tape or CD-ROM drives.

DIAGNOSTICS

     pci_mem_find: expected mem type 00000000, found 00000002
		   This message may be displayed during autoconfiguration if the controller's memory is mapped below 1MB in physical address
		   space.  This can be disabled either through changing a setting in the controller's BIOS utility, or changing the position of a
		   jumper on the board.  See your controller's documentation for more information.

SEE ALSO

     intro(4), ld(4), scsi(4)

HISTORY

     The icp driver first appeared in NetBSD 1.6, and was based on the FreeBSD and OpenBSD drivers of the same name.

BUGS

     ISA & EISA front-ends and a management interface are needed.

     Older PCI boards are not yet supported.

BSD
								  April 20, 2002							       BSD
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