Date: Fri, 19 Mar 2004 17:49:26 +0530 From: "sundeep" <sundeep@stellarinfo.com> To: <freebsd-doc@freebsd.org> Subject: cylinder group size problem Message-ID: <000801c40dac$6e2dfc60$096e10ac@sundeep>
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Hi all, I am working on Solaris 8 . Its default file system is UFS. My problem = is regarding to the file system. I create two partition 1) / 1.2 Gb and = 2) /home 4.5 GB In root partition there were 76 Cylinder groups ,when I was traversing = the Cylinder Groups I found that the length of one cylinder Group was = 32320 sector long. Up to 32 cylinder groups that length was absolutely = fine ,when I jump to the 33rd Cyl. Grp. That difference reduces to 31296 = sectors it means it reduces by 1024 sectors. And it happens at every = multiple of 32 cylinder groups. Is there any information regarding this = in SuperBlock or in Cylinder Summary Block Structure. =20 In 2nd case of /home partition there were 286 cyl. Grp. , the length of = 1 Cylinder Group was 98848 , In this case also when I jump to 32nd to = 33rd Cylinder Group the length reduces to 2048 sectors,It means length = becomes 96800 sectors. It happens every multiple of 32 means 64th to = 65th , 96th to 97th like this.=20 This difference usually came when I create a big partitions but when I = create 1 gb partition then this difference became 1024 sectors. Please help me to solve this problem how can I got this value or is = there any formula. I am also not getting the structure of "cylinder group summary area" its = address is defined in Superblock structure. With Thanks and Regards =20 Sundeep Saini
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