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Running Systems

Technical blog by Etzion Bar Noy covering technical aspects of day to day of an infrastructure consultant

Running Systems
Running Systems
Technical blog by Etzion Bar Noy covering technical aspects of day to day of an infrastructure consultant
  • Disk Storage | Linux

    Hot-Adding SAN lun to Linux (RH with Qlogic drivers)

    ByEtzion 18/09/2006

    cat /proc/scsi/qla2xxx/$Z” where Z represents the SCSI interface the Qlogic has taken for itself, you’ll get something like this: <Snip> . . </Snip> SCSI LUN Information: (Id:Lun) * – indicates lun is not registered with the OS. ( 0: 0): Total reqs 63185608, Pending reqs 0, flags 0x2, 0:0:81 00 Assuming you’ve just added the…

    Read More Hot-Adding SAN lun to Linux (RH with Qlogic drivers)Continue

  • General Hardware | Linux

    RHEL 4 32bit on Tyan Thunder K8QE

    ByEtzion 09/09/2006

    It’s sort of a relationship between myself and this Tyan. Same server, changing demands. This time, we’ve had to install on this server RHEL4 32bit. Net-installing RHEL4 Update 3 was impossible. See here, so we’ve installed it from CDs (didn’t have PCI-X network card handy). When booting the server, it showed us only a single…

    Read More RHEL 4 32bit on Tyan Thunder K8QEContinue

  • General Hardware | Linux

    Update – Netboot on RHEL x86 (32bit) with Broadcom (tg3) – no network

    ByEtzion 27/08/2006

    In my post just below, I have defined a set of tests to verify the possible cause of the tg3 problem. It had nothing to do with autoneg, and was fixed in RHEL 4 Update 4. That 32bit installer works correctly. One last thing to test – rebuild the installer initrd, and replace tg3 module…

    Read More Update – Netboot on RHEL x86 (32bit) with Broadcom (tg3) – no networkContinue

  • Uncategorized

    Netboot on RHEL x86 (32bit) with Broadcom (tg3) – no network

    ByEtzion 24/08/2006

    I have a PXE installation server setup, and it usually works quite well. I have tried to install a Tyan based system using this setup, but this time – RHEL4 U3 X86 and not the usual X86_64 system. RH installer starts by asking few questions (language, keyboard, method of installation) and fails to obtain DHCP…

    Read More Netboot on RHEL x86 (32bit) with Broadcom (tg3) – no networkContinue

  • Uncategorized

    Tyan Thunder K8QE and Linux RHEL 4 Update 3

    ByEtzion 13/08/2006

    This board is a tricky board. 4GB RAM and above behave in a weird manner in Linux. It appears that PCI 32bit mapping doesn’t work correctly under Linux. To allow Linux to work on this hardware without failure (such as kernel crush during startup), you must follow these three simple guidelines: 1. Spread the memory…

    Read More Tyan Thunder K8QE and Linux RHEL 4 Update 3Continue

  • HP-UX

    HP-UX – allowed shells, and connecting FC Multipath to NetApp

    ByEtzion 10/08/2006

    When adding a certain shell to an HP-UX system, for example, /usr/bin/tcsh, each user set to use this shell will not be able to FTP to the machine, until there is entry in /etc/shells. The trick is that even if the file doesn’t exist, you have to create it. By default, HP-UX allows only /sbin/sh…

    Read More HP-UX – allowed shells, and connecting FC Multipath to NetAppContinue

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