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- Path: sparky!uunet!haven.umd.edu!umd5!elea.umd.edu!mark
- From: mark@elea.umd.edu (Mark Sienkiewicz)
- Newsgroups: comp.sys.hp
- Subject: Re: Disk partitioning/layout (Was: New 877 Installation)
- Message-ID: <17777@umd5.umd.edu>
- Date: 4 Jan 93 17:08:41 GMT
- References: <JTHOMAS.92Dec24140611@navajo.nmsu.edu> <JTHOMAS.92Dec28161410@navajo.nmsu.edu>
- Sender: news@umd5.umd.edu
- Organization: University of Maryland
- Lines: 18
-
- In article <JTHOMAS.92Dec28161410@navajo.nmsu.edu> jthomas@nmsu.edu (James Thomas) writes:
- >b) Back 20 years ago, I could tell TOPS-10 where I wanted its equivalent
- >to the inode table. That is still missing in unix. If I set a disk up
- >with only section 2, I would like to be able to say that the inode table
- >should be put smack in the middle (if I don't want a single file,
- >contiguous though unix also can't particulary do that anyway). That
- >way seeks are minimized when the relatively common requirement to find some
- >inode information happens.
-
- You can't tell it where exactly to put the inodes, but you can adjust
- the size of the cylinder groups. In the BSD filesystem (which HPUX
- certainly appears to be using), the disk is split up into "cylinder groups".
- Each cylinder group has a bunch of inodes and a bunch of data blocks. Data
- blocks are allocated from the same cylinder group that the inode is in
- (subject to some restrictions). You can see some of the things to tweak
- in the man page for tunefs.
-
-
-