https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912684#M26340 How can I determine if my local disk is being mirrored using Hardware raid? Where would I see this? <BR /><BR /> Wed, 13 Dec 2006 21:07:10 GMT joseph wholey 2006-12-13T21:07:10Z https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912684#M26340 How can I determine if my local disk is being mirrored using Hardware raid? Where would I see this? <BR /><BR /> Wed, 13 Dec 2006 21:07:10 GMT https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912684#M26340 joseph wholey 2006-12-13T21:07:10Z https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912685#M26341 That depends on the hardware RAID controller unfortunately.<BR /><BR />Start off by giving us the output of 'dmesg', and the content of '/proc/scsi/scsi', and the device name of the disk you want to check (/dev/sd?).<BR /><BR />From there, we'll point you in the direction you need to look next. Wed, 13 Dec 2006 23:50:05 GMT https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912685#M26341 Stuart Browne 2006-12-13T23:50:05Z https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912686#M26342 Hi Joseph,<BR /><BR />We need more information:<BR />* What kernel is running?<BR />* What controller is used? <BR /> try:# lspci<BR />* What driver is used?<BR /> try:# lsmod<BR /><BR />Sometimes you can retrieve raid-state from <BR />/proc <BR /><BR />e.g.: for MYLEX-Controller:<BR /><BR /># grep /proc/rd/c*/current_state<BR /><BR />Sample output:<BR /><BR />***** DAC960 RAID Driver Version 2.4.11 of 11 October 2001 *****<BR />Configuring Mylex AcceleRAID 352 PCI RAID Controller<BR />0:7 Vendor: MYLEX Model: AcceleRAID 352 Revision: 0600<BR />1:7 Vendor: MYLEX Model: AcceleRAID 352 Revision: 0600<BR />/dev/rd/c0d0: RAID-1, Online, 29360128 blocks<BR />/dev/rd/c0d1: RAID-1, Online, 41697280 blocks<BR />/dev/rd/c0d2: RAID-1, Online, 71057408 blocks<BR /><BR />##################################################<BR /><BR />Another way on systems with LSI Megaraid or Dell Expandable RAID:<BR /><BR />download "megarc" from <A href="http://www.lsilogic.com" target="_blank">www.lsilogic.com</A><BR /><BR /># megarc -ldInfo -a0 -L0<BR /><BR /><BR /> **********************************************************************<BR /> MEGARC MegaRAID Configuration Utility(LINUX)-1.11(12-07-2004) <BR /> By LSI Logic Corp.,USA<BR /> **********************************************************************<BR /> [Note: For SATA-2, 4 and 6 channel controllers, please specify<BR /> Ch=0 Id=0..15 for specifying physical drive(Ch=channel, Id=Target)]<BR /><BR /> Type ? as command line arg for help<BR /><BR /><BR /> Finding Devices On Each MegaRAID Adapter...<BR /> Scanning Ha 0, Chnl 1 Target 15 <BR /><BR /> *******Information Of Logical Drive 0*******<BR /><BR /> Logical Drive : 0( Adapter: 0 ): Status: OPTIMAL<BR /> ---------------------------------------------------<BR /> SpanDepth :01 RaidLevel: 1 RdAhead : No Cache: DirectIo<BR /> StripSz :064KB Stripes : 2 WrPolicy: WriteBack<BR /><BR /> Logical Drive 0 : SpanLevel_0 Disks<BR /> Chnl Target StartBlock Blocks Physical Target Status<BR /> ---- ------ ---------- ------ ----------------------<BR /> 0 00 0x00000000 0x017a0000 ONLINE<BR /> 0 03 0x00000000 0x017a0000 ONLINE<BR /><BR />##############################################<BR /><BR /><BR />rgds<BR />HGH<BR /> Thu, 14 Dec 2006 04:37:30 GMT https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912686#M26342 Hemmetter 2006-12-14T04:37:30Z https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912687#M26343 lspci will show if there is "RAID" controller. Combined with dmesg, you are pretty sure to confirm if Hardware raid is in place. Thu, 14 Dec 2006 08:58:29 GMT https://community.hpe.com/t5/operating-system-linux/linux-hardware-raid/m-p/3912687#M26343 George Liu_4 2006-12-14T08:58:29Z