<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="Street"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="address"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body lang=EN-GB link=blue vlink=purple> <div class=Section1> Hi,<o:p></o:p> <o:p> </o:p> I am having a problem with a correct method for fdisk raw partitions in preparation for Oracle OCR. I know that you cant fdisk the /dev/mapper or /dev/dm-1 disks directly. Currently we have the following setup<o:p></o:p> <o:p> </o:p> mpath11 (360a98000433543364734454a6f533061)<o:p></o:p> [size=300 MB][features="1 queue_if_no_path"][hwhandler="0"]<o:p></o:p> \_ round-robin 0 [prio=8][active]<o:p></o:p> \_ 3:0:0:1 sdb 8:16 [active][ready]<o:p></o:p> \_ 4:0:0:1 sdl 8:176 [active][ready]<o:p></o:p> \_ round-robin 0 [prio=2][enabled]<o:p></o:p> \_ 3:0:1:1 sdg 8:96 [active][ready]<o:p></o:p> \_ 4:0:1:1 sdq 65:0 [active][ready]<o:p></o:p> <o:p> </o:p> I have fdisk’ed the sbd (underlying) disk and rebooted to bring multipath into sync.<o:p></o:p> <o:p> </o:p> /dev/mpath now has the following entries<o:p></o:p> <o:p> </o:p> lrwxrwxrwx 1 root root 7 Oct 25 11:53 mpath11 -> ../dm-0<o:p></o:p> lrwxrwxrwx 1 root root 7 Oct 25 11:53 mpath11p1 -> ../dm-9<o:p></o:p> <o:p> </o:p> /dev/mapper<o:p></o:p> <o:p> </o:p> brw-rw---- 1 oracle oinstall 253, 4 Oct 25 11:53 mpath11<o:p></o:p> brw-rw---- 1 oracle oinstall 253, 5 Oct 25 11:53 mpath11p1<o:p></o:p> <o:p> </o:p> I have tried addressing the <o:p></o:p> <o:p> </o:p> I have specified the raw devices /etc/sysconfig/rawdevices using the major minor id’s<o:p></o:p> <o:p> </o:p> /dev/raw/raw5 253 5<o:p></o:p> <o:p> </o:p> However when trying to exchange data between the shared luns<o:p></o:p> <o:p> </o:p> Dd if=/etc/hosts of=/dev/raw/raw5 I am getting an error. <o:p></o:p> <o:p> </o:p> However if I do the following dd if=/etc/hosts of=/dev/mpath/mpath11p1 the transfer works successfully. <o:p></o:p> <o:p> </o:p> This has come about as each of the servers is reporting the /mpath’s back as different numbers. The /dev/dm-1 etc are all fine, how do I bring the mpath back into sync, e.g. mpath1 across all boxes. Also am I going about things the right way or fundamentally flawed?<o:p></o:p> <o:p> </o:p> Regards<o:p></o:p> <o:p> </o:p> Charles Batchelor<o:p></o:p> <o:p> </o:p> Charles Batchelor<o:p></o:p> Senior Technical Specialist<o:p></o:p> + Herald and Times Group<o:p></o:p> <st1:Street w:st="on"><st1:address tabIndex="0" style="BACKGROUND-POSITION: left bottom; BACKGROUND-IMAGE: url(res://ietag.dll/#34/#1001); BACKGROUND-REPEAT: repeat-x" w:st="on">200 Renfield Street</st1:address></st1:Street><o:p></o:p> <st1:City w:st="on"><st1:place w:st="on">Glasgow</st1:place></st1:City> G2 3QB<o:p></o:p> <st1:country-region w:st="on"><st1:place w:st="on">Scotland</st1:place></st1:country-region><o:p></o:p> ( Tel: 0141 - 302 7011<o:p></o:p> Fax: 0141 - 302 7901 : Email: <st1:PersonName w:st="on">charles.batchelor@glasgow.newsquest.co.uk</st1:PersonName><o:p></o:p> <o:p> </o:p> Please take the time to fill out the IT Satisfaction survey form @ <a href="http://intranet/informationtechnology/itsurvey.shtml">http://intranet/informationtechnology/itsurvey.shtml</a><a href="http://intranet/IT/survey.asp" title="http://intranet/IT/survey.asp"></a><o:p></o:p> <o:p></o:p> <o:p> </o:p> </div> <pre> -------------------------------------------------------------------- This email has been scanned for viruses and other threats using Newsquest's Ironport email filters This e-mail, including any attachment, is private and confidential. It should not be read, copied, disclosed or otherwise used by any person other than the intended recipient(s). If you have received this e-mail in error, please notify the sender immediately. Newsquest reserves the right to monitor e-mails in accordance with the Telecommunications (Lawful Business Practice) (Interception of Communications) Regulations 2000. Newsquest Limited. Registered in England, number 3105111 . Registered office: 58 Church Street, Weybridge, Surrey KT13 8DP -------------------------------------------------------------------- </pre></body> </html>