https://community.hpe.com/t5/operating-system-linux/how-to-check-newly-configured-disk/m-p/3981688#M27843 Shalom,<BR /><BR />You don't guess, you test.<BR /><BR />dd if=/dev/sdb of=/dev/null bs=1024 count=100000<BR /><BR />fdisk -l to see what devices are available.<BR /><BR />SEP Mon, 16 Apr 2007 01:52:38 GMT Steven E. Protter 2007-04-16T01:52:38Z https://community.hpe.com/t5/operating-system-linux/how-to-check-newly-configured-disk/m-p/3981687#M27842 I got a IBM Blade server. The disk configuration is like this<BR /><BR />2 disk with mirror -&gt; /dev/sda<BR />3 disk on RAID 5<BR /><BR />I guess the 3 disk on RAID 5 should form a PV called /dev/sdb, but when I try to execute fdisk, the "unable to open /dev/sdb" is returned. It seems the OS is not recognizing the new disk array. Please kindly advise how to check the newly configured disk. Thanks a lot Sun, 15 Apr 2007 22:32:13 GMT https://community.hpe.com/t5/operating-system-linux/how-to-check-newly-configured-disk/m-p/3981687#M27842 Kenneth Leung_2 2007-04-15T22:32:13Z https://community.hpe.com/t5/operating-system-linux/how-to-check-newly-configured-disk/m-p/3981688#M27843 Shalom,<BR /><BR />You don't guess, you test.<BR /><BR />dd if=/dev/sdb of=/dev/null bs=1024 count=100000<BR /><BR />fdisk -l to see what devices are available.<BR /><BR />SEP Mon, 16 Apr 2007 01:52:38 GMT https://community.hpe.com/t5/operating-system-linux/how-to-check-newly-configured-disk/m-p/3981688#M27843 Steven E. Protter 2007-04-16T01:52:38Z