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Full Discussion: iostat as a tool for generating disk IO
Operating Systems Solaris iostat as a tool for generating disk IO Post 302433236 by SmartAntz on Tuesday 29th of June 2010 04:10:06 AM
Old 06-29-2010
Quote:
Originally Posted by bartus11
To assign disk driver names to their logical names (c0t0d0s0 etc) run "format". It will display list of disks with their device path and logical name.

erm... i run the format command, how do know the EMC which device? sd0? ssd0 ?

Code:
root@mercury # format </dev/null
Searching for disks...done


AVAILABLE DISK SELECTIONS:
       0. c0t0d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
          /pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@0,0
       1. c0t1d0 <SUN72G cyl 14087 alt 2 hd 24 sec 424>
          /pci@0,600000/pci@0/pci@8/pci@0/scsi@1/sd@1,0
       2. c1t0d0 <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pci@0,600000/pci@0/pci@9/SUNW,qlc@0/fp@0,0/ssd@w5006016141e0a4cd,0
       3. c1t0d1 <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pci@0,600000/pci@0/pci@9/SUNW,qlc@0/fp@0,0/ssd@w5006016141e0a4cd,1
       4. c3t0d0 <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pci@2,600000/SUNW,qlc@0/fp@0,0/ssd@w5006016841e0a4cd,0
       5. c3t0d1 <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pci@2,600000/SUNW,qlc@0/fp@0,0/ssd@w5006016841e0a4cd,1
       6. emcpower0a <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pseudo/emcp@0
       7. emcpower1a <DGC-RAID10-0326 cyl 61438 alt 2 hd 256 sec 40>
          /pseudo/emcp@1
Specify disk (enter its number):
root@mercury #

 

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LEARN ABOUT FREEBSD

nvd

NVD(4)							   BSD Kernel Interfaces Manual 						    NVD(4)

NAME

     nvd -- NVM Express disk driver

SYNOPSIS

     To compile this driver into your kernel, place the following lines in your kernel configuration file:

	   device nvme
	   device nvd

     Or, to load the driver as a module at boot, place the following lines in loader.conf(5):

	   nvme_load="YES"
	   nvd_load="YES"

DESCRIPTION

     The nvd driver exposes NVM Express (NVMe) namespaces as disks to the kernel disk storage API.  It depends on the nvme(4) driver for notifica-
     tion of existing NVMe namespaces and submission of NVM I/O commands.

     Device nodes from the nvd driver will have the format /dev/nvdX and are GEOM(4) disks which can be partitioned by geom(8).  Note that device
     nodes from the nvme(4) driver are not GEOM(4) disks and cannot be partitioned.

SEE ALSO

     GEOM(4), nvme(4), geom(8), nvmecontrol(8), disk(9)

HISTORY

     The nvd driver first appeared in FreeBSD 9.2.

AUTHORS

     The nvd driver was developed by Intel and originally written by Jim Harris <jimharris@FreeBSD.org>, with contributions from Joe Golio at EMC.

     This man page was written by Jim Harris <jimharris@FreeBSD.org>.

BSD
								  March 18, 2014							       BSD
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