The UNIX and Linux Forums - Filesystems, Disks and Memory http://www.unix.com/ Discuss NAS, SAN, RAID, Robotic Libraries, backup devices, RAM, DRAM, SCSI, IDE, EIDE topics here. en Fri, 20 Nov 2009 23:45:53 GMT vBulletin 5 http://solaris.unix.com/images/misc/rss.jpg The UNIX and Linux Forums - Filesystems, Disks and Memory http://www.unix.com/ Gfs2 vs xfs vs ext4 http://www.unix.com/filesystems-disks-memory/123562-gfs2-vs-xfs-vs-ext4-new-post.html Thu, 12 Nov 2009 05:23:56 GMT Looking for suggestions as to which filesystem to go with. I currently use gfs2 on hosts with 3.4tb useable. I understand gfs2 is being left behind but xfs and ext4 are not quite certified completely on CentOS 5.2. I have email storage hosts that have a decent i/o requirement and 12TB usable after... Looking for suggestions as to which filesystem to go with. I currently use gfs2 on hosts with 3.4tb useable. I understand gfs2 is being left behind but xfs and ext4 are not quite certified completely on CentOS 5.2. I have email storage hosts that have a decent i/o requirement and 12TB usable after raid 1+0. We tried ext3 but it was just too slow, I am not sure if ext4 is any faster or not. I also would like to hear peoples experience with recovery on these. How long to fsck, how successful are they, etc?

Any feedback is appreciated ]]> Filesystems, Disks and Memory king_hippo http://www.unix.com/filesystems-disks-memory/123562-gfs2-vs-xfs-vs-ext4.html internal disk and external disk question http://www.unix.com/filesystems-disks-memory/122955-internal-disk-external-disk-question-new-post.html Thu, 05 Nov 2009 04:49:42 GMT Hello, We are running sun solaris and it is connected to SAN storage. How do I find what are the disks are internal and what are the disks are connected to SAN? Hello,

We are running sun solaris and it is connected to SAN storage. How do I find what are the disks are internal and what are the disks are connected to SAN? ]]> Filesystems, Disks and Memory mokkan http://www.unix.com/filesystems-disks-memory/122955-internal-disk-external-disk-question.html linux mounting drive issue http://www.unix.com/filesystems-disks-memory/122210-linux-mounting-drive-issue-new-post.html Tue, 27 Oct 2009 10:25:56 GMT While shutting down the linux system, it checks the mounting drives it hav, and if the mounted drive is on network, and that network system is shut already, the system get hangs, and it has to shut forcefully Is there a way, so that, mounting drives are unmounted automatically, when the other... While shutting down the linux system, it checks the mounting drives it hav, and if the mounted drive is on network, and that network system is shut already, the system get hangs, and it has to shut forcefully
Is there a way, so that, mounting drives are unmounted automatically, when the other machine on network is shut and it get mounted automatically wen both machines are up???

Server:centOS 5.3
Client: Windows xp

TIA ]]> Filesystems, Disks and Memory oracle.test2 http://www.unix.com/filesystems-disks-memory/122210-linux-mounting-drive-issue.html data from blktrace: read speed V.S. write speed http://www.unix.com/filesystems-disks-memory/122102-data-blktrace-read-speed-v-s-write-speed-new-post.html Mon, 26 Oct 2009 09:45:15 GMT I analysed disk performance with blktrace and get some data:
read:
Code:
  8,3    4    2141    2.882115217  3342  Q  R 195732187 + 32 [cat]
  8,3    4    2142    2.882116411  3342  G  R 195732187 + 32 [cat]
  8,3    4    2144    2.882117647  3342  I  R 195732187 + 32 [cat]
  8,3    4    2145    2.882118965  3342  D  R 195732187 + 32 [cat]
  8,3    4    2149    2.884145702    0  C  R 195732187 + 32 [0]
write:
Code:
 
  8,3    4    43622    5.305507398  3436  Q  W 17805895 + 8 [bash]
  8,3    4    43623    5.305508277  3436  G  W 17805895 + 8 [bash]
  8,3    4    43624    5.305508574  3436  I  W 17805895 + 8 [bash]
  8,3    2      414    5.306695591    0  D  W 17805895 + 16 [swapper]
  8,3    2      418    5.307020642    0  C  W 17805895 + 16 [0]
And, d2c time of one read request is 0.002026737s. On the other hand, d2c time of one write request is 0.000325051s. It show: read time > write time. Is it right? why? I have no idea. ]]> Filesystems, Disks and Memory W.C.C http://www.unix.com/filesystems-disks-memory/122102-data-blktrace-read-speed-v-s-write-speed.html Restricted File Creation for particuler pattern http://www.unix.com/filesystems-disks-memory/121949-restricted-file-creation-particuler-pattern-new-post.html Fri, 23 Oct 2009 10:46:09 GMT HI All, I have this wierd requirment. Any help will be appriciated.

I need to restrict file creation with certain pattern. Suppose, i want my system not to allow creation of files with *.exe extension. The requirment is that file should not be created like it happen in windows you can't create file with name "com, lpr etc etc" same thing i need in unix/linux..i want to create a rule saying that this system will not accept any file name ending with *.exe and *.txt.

Please advice.. ]]> Filesystems, Disks and Memory r00t4u http://www.unix.com/filesystems-disks-memory/121949-restricted-file-creation-particuler-pattern.html