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Download of the day: Asus EEEPC Linux Software Development Kit ( SDK )

Asus has launched an open-source project for its cheap ASUS Eee laptop PC . You can download SDK and start developing more applications. It is a collection of programming tools, utilities, documentation, and libraries for Asus Linux EEEPc.

From the project home page:

This is an open-source project for ASUS Eee PC series. It provides a center for the community of Eee PC users and developers, including source code, documentation and experience sharing. The project is officially supported by ASUS.

=> Download Asus EEEPC SDK [ ISO / Vmware Images - 885 megabytes)

Why my Linux server ext3 filesystem go read-only?

From my mailbag:

We have 5 Dell server collocated running CentOS 4.x and 5.x server operating system. Sometime my file system (ext3) goes read-only. I’d like to know what could be causing such a problem?

My guess:
a) Hardware problem / hard disk problem, check harddisk for errors.

b) High disk I/O aka busy I/O retry error can mark low level disk call as failed. This will force ext3 to go into read only mode.

c) High disk I/O on SAN

d) SAN is not configured properly for the path failover.

In all sort of problems ext3 goes read-only to protect the filesystem and further damage. If you are using VMWARE, check out official webpage to download SCSI patches or workaround for vmware problems.

So what could be causing the file system on Linux go read-only?

Apart from above generic problem, any other error can trigger filesystem on Linux go read only. I hope our reader / seasoned Linux admin can help to answer this question. Please share the experiences and advice in the comments.

Howto: Create Shared Storage on Suse Linux using OCFS2 and Xen Virtualization

Arun Singh shows us how to create shared storage on SUSE Linux Enterprise Server 10 using OCFS2 (Oracle Cluster File System v2 for shared storage) and Xen Virtualization technology. Enterprise grade shared storage can cost you lots of money but here no real expensive shared storage used. The information provided here works with real shared storage as well:

This paper is to help you to understand the steps involved in creating shared storage without using expensive shared storage. Using this information you can create shared storage used by all xen guest OS and Host, avoiding copying of files between guest OS's. Hope you will find this paper useful.

You can easily port instructions to Redhat or any other Linux distro without a problem. You can also use Redhat's Global File System (GFS) too. We often use Fibre Channel or iSCSI, devices for GFS shared storage.

Creating shared storage on SUSE Linux Enterprise Server 10 using Xen and OCFS2 [novell.com]

On a related note there is also article about creating a highly available VMware Server environment on a Debian Etch system.