https://community.hpe.com/t5/disk-enclosures/array-expansion-amp-logical-disk-corruption/m-p/3933959#M22736 Hi,<BR /> recently I had to expand the arrays/logical drives on a number of our servers (ml370 G3/4's). Most of them went quite smoothly however we had trouble on two of them. <BR /><BR />We had problems on two servers. Both were ML370 G3's, the array cards were Smart Array 5300's. Both servers had 5 x 72 GB drives configured as a single array and a single (raid 5) logical drive. Both had a 6th 72GB drive added, after which it was added to the existing array. The logical drive was then expanded. <BR /><BR />What occured was that during the array/logical drive expansion the OS (W2k3 SP1) reported 1000's of event 51 errors (An error was detected on device \Device\Harddisk0 during a paging operation.) and the OS became extremely unstable - response to the console was very slow, I had to connect via ILO as RDP sessions were unuseable. apps running on the server (eg domino server) was unuseable. <BR /><BR />Once the second phase of the expansion completed (the logival drive) the errors stopped. I could then extend the data partition in the OS without any trouble and the server response returned to "normal". <BR /><BR />Has anyone seen this type of behaviour before or have an idea as to what might have caused it? <BR /><BR /><BR /><BR /> Sun, 28 Jan 2007 20:10:19 GMT DavidBlake 2007-01-28T20:10:19Z https://community.hpe.com/t5/disk-enclosures/array-expansion-amp-logical-disk-corruption/m-p/3933959#M22736 Hi,<BR /> recently I had to expand the arrays/logical drives on a number of our servers (ml370 G3/4's). Most of them went quite smoothly however we had trouble on two of them. <BR /><BR />We had problems on two servers. Both were ML370 G3's, the array cards were Smart Array 5300's. Both servers had 5 x 72 GB drives configured as a single array and a single (raid 5) logical drive. Both had a 6th 72GB drive added, after which it was added to the existing array. The logical drive was then expanded. <BR /><BR />What occured was that during the array/logical drive expansion the OS (W2k3 SP1) reported 1000's of event 51 errors (An error was detected on device \Device\Harddisk0 during a paging operation.) and the OS became extremely unstable - response to the console was very slow, I had to connect via ILO as RDP sessions were unuseable. apps running on the server (eg domino server) was unuseable. <BR /><BR />Once the second phase of the expansion completed (the logival drive) the errors stopped. I could then extend the data partition in the OS without any trouble and the server response returned to "normal". <BR /><BR />Has anyone seen this type of behaviour before or have an idea as to what might have caused it? <BR /><BR /><BR /><BR /> Sun, 28 Jan 2007 20:10:19 GMT https://community.hpe.com/t5/disk-enclosures/array-expansion-amp-logical-disk-corruption/m-p/3933959#M22736 DavidBlake 2007-01-28T20:10:19Z