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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>hi group..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>does anybody have expertise on this matter..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>maybe wes or ryan have inside info..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>we had a TAC case with failed HDD and problematic RAID controller in MCS-7825-I4 server running CUCM 7.1.5..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>the symptom happend when we shutdown the server in order to check what IBR FRU is on memory inside the server..we checked it and after that we powered up the server.. RAID controller reports DEGRADED state..cisco OS started to boot and in certain point it reported something like “ unsupported hardware......not for the production..without TAC support..bla..bla..bla )”..we opened the case..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>during the case we upgraded all kinds of firmware on server and also find out that one HDD failed..we replaced it and troubleshooted more..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>finally we got RMA for the server but have spotted very strange behavior on the new server as well ( we put in into lab to test it )..so, we’re thinking , is the following expected behaviour or there is a serious problem in cisco OS or IBM HW..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font size=2 face=Calibri><span style='font-size:11.0pt'><span style='mso-list:Ignore'>1.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>first of all we upgraded the HDD firmware on the new server we got from RMA to 3B06 ( it was with 3B05 ) having in mind <b><span style='font-weight:bold'>CSCti52867 </span></b>which we hitted earlier..after that we’installed CUCM 7.1.5..<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font size=2 face=Calibri><span style='font-size:11.0pt'><span style='mso-list:Ignore'>2.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>when server is shut down and we pull out the right hard drive ( the one in BAY 1)..we power up the server..RAID controller detects one drive missing and reports DEGRADED state..cisco OS starts to boot and in certain point it reports again something like “ unsupported hardware......not for the production..without TAC support..bla..bla..bla )..<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font size=2 face=Calibri><span style='font-size:11.0pt'><span style='mso-list:Ignore'>3.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>when we shut down the server again..and switch the scenario..we get back the right HDD in server ( BAY 1 ) and pull out the left HDD out ( BAY 0 )..when we power up the server..it doesn’t even detect bootable device like there is no HDDs inside..<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font size=2 face=Calibri><span style='font-size:11.0pt'><span style='mso-list:Ignore'>4.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>so, when we shut down the server again..and get back both HDDs where they belong..power up the server..everythings works fine..of course, RAID is resynching..<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><font size=2 face=Calibri><span style='font-size:11.0pt'><span style='mso-list:Ignore'>5.<font size=1 face="Times New Roman"><span style='font:7.0pt "Times New Roman"'> </span></font></span></span></font><![endif]>of course both HDDs used in server are in correct state and aren’t failed..<o:p></o:p></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>so, i’m a little bit confused, since it’s happening on 2 different servers..identical scenario..my RAID1 perception is in serious doubt..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>does this mean that if HDD failed during regular maintenance shutdown ( which we had in the first place ), RAID shouldn’t provide operational system?..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>to be honest , we didn’t have failed disk while server was up and online so we couldn’t notice what’s going on in that situation..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>but the fact is, with the old server and with the new server, when we pull out one of the HDDs the system wouldn’t boot up properly..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>is this expected behaviour?..what’s the purpose of RAID1 then?..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>is RAID1 expected to cover just online HDD failure ( if so ) or it should work in every scenario?..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>any thoughts?..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>thanx..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>regards..<o:p></o:p></span></font></p><p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p><p class=MsoNormal><b><font size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black;font-weight:bold'>Sinisa Djokic</span></font></b><font size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span></font><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></font></p><p class=MsoNormal><font size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>System Engineer</span></font><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:black'><br></span></font><font size=2 color=black face=Arial><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>CCIE #25996 Voice</span></font><font size=3 color=black face=Arial><span style='font-size:12.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></font></p><p class=MsoNormal><font size=3 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