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title SME Server (2.6.21-rc5-git1-custom-via)
title SME Server (2.6.21-rc5-git1-custom-via)
root (hd0,0)
root (hd0,0)
kernel /vmlinuz-2.6.21-rc5-git1-custom-via ro root=/dev/hda6
kernel /vmlinuz-2.6.21-rc5-git1-custom-via ro root=/dev/main/root
initrd /initrd-2.6.21-rc5-git1-custom-via.img
initrd /initrd-2.6.21-rc5-git1-custom-via.img
==Other Tips & Tricks==
==Other Tips & Tricks==
According to [http://forums.viaarena.com/messageview.aspx?catid=28&threadid=77032 this thread], the chipset used on many VIA C7-based boards is quite sensitive to overheating. This may cause lockups during high disk activity, especially if your board is passively cooled and in a small case.
According to [http://www.tkarena.com/forums/linux-arena/32095-j7f4k-hard-lockups-14.html#post228588 this thread], the chipset used on many VIA C7-based boards is quite sensitive to overheating. This may cause lockups during high disk activity, especially if your board is passively cooled and in a small case.
Jetway has released a [http://download.jetway.com.tw/download/bios/J7F4A06.BIN new BIOS version (A06) for J7F4 boards] that seems to more or less fix this problem. To flash it, you'll need to [http://www.nenie.org/misc/flashbootcd.html boot the board in DOS] and use the [http://download.jetway.com.tw/download/utilities/awdflash.zip Award flash utility]. If you keep experiencing mysterious lockups after the BIOS-update, it is advisable to add a CPU- or case-fan or to fit the board into a bigger case.
Jetway has released a [http://download.jetway.com.tw/download.asp?sorder=Name&sword=J7F4K1G5D new BIOS version (A07) for J7F4 boards] that seems to more or less fix this problem. To flash it, you'll need to [http://www.nenie.org/misc/flashbootcd.html boot the board in DOS] and use the [http://download.jetway.com.tw/download/utilities/awdflash.zip Award flash utility]. If you keep experiencing mysterious lockups after the BIOS-update, it is advisable to add a CPU- or case-fan or to fit the board into a bigger case.
Jetway have released a new revision of the J7F4 mainboard, which incorporates a bigger heatsink in conjunction with the new BIOS to solve the overheating problems. Thanks to Ryan Salsbury for pointing this out. Ryan has also kindly provided pictures of the old and new board revisions:
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_EDEN_Mainboard_-_Dual_GigaLAN_main.jpg The board with the old, small heatsink]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_EDEN_Mainboard_-_Dual_GigaLAN_rear.jpg Rear view of the old board]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_Eden_CN700_Mainboard_-_Dual_GigaLAN_-__NEW_REVISION_main.jpg New board, with larger heatsink]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_Eden_CN700_Mainboard_-_Dual_GigaLAN_-__NEW_REVISION_front.jpg Front view of the new board]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_Eden_CN700_Mainboard_-_Dual_GigaLAN_-__NEW_REVISION_rear.jpg Rear view of the new board]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_Eden_CN700_Mainboard_-_Dual_GigaLAN_-__NEW_REVISION_side.jpg Side view of the new board]
* [http://www2.multithread.co.uk/mtcshop/images/linitx.com/products/Jetway_J7F4K_1.2GHz_Eden_CN700_Mainboard_-_Dual_GigaLAN_-__NEW_REVISION_Overview.jpg Overview of the new board]
==Kernel Version Issues==
People have reported that USB drive recognition will no longer work after updating the kernel. This is due to the fact that the udev version used in CentOS 4 will not work with kernel versions above 2.6.12. You will need to update the udev package. I will update this Howto as soon as I have tried this myself. In the mean time, you may find newer udev versions here: ftp://ftp.kernel.org/pub/linux/utils/kernel/hotplug/
People have reported that USB drive recognition will no longer work after updating the kernel. This is due to the fact that the udev version used in CentOS 4 will not work with kernel versions above 2.6.12. You will need to update the udev package. I will update this Howto as soon as I have tried this myself. In the mean time, you may find newer udev versions here: ftp://ftp.kernel.org/pub/linux/utils/kernel/hotplug/
Another problem is that the custom kernel may cause problems when trying to upgrade SME. On any update that includes a newer kernel, yum will complain about dependency problems because the custom kernel has a higher version-number than the kernel that is to be updated. The only way around this seems to be to uninstall the custom kernel (using yum remove ...), do the upgrade, and then re-install the custom kernel before rebooting.
You can also use the exclude package option to avoid kernel and kmod updates, and everything will just work fine !
==Author and Acknowledgements==
==Author and Acknowledgements==
This Howto is written by Levien van Zon (levien at scum.org). It is based to a large extent on forum postings and documents by Harro, Charlie Brady, Falko Timme, Simon Arlott, Neil and many others. See the references below for more information. This document may still contain mistakes and typos, so please feel free to add or correct things if you have wiki-access. You can also send corrections and suggestions to the author by e-mail.
This Howto is written by Levien van Zon (levien at scum.org). It is based to a large extent on forum postings and documents by Harro, Charlie Brady, Falko Timme, Simon Arlott, Neil, Ryan Salsbury and many others. See the references below for more information. This document may still contain mistakes and typos, so please feel free to add or correct things if you have wiki-access. You can also send corrections and suggestions to the author by e-mail.
==References==
==References==
