Hi, I was interested in Linux's RAID capabilities and read that mdadm was the tool of choice. We are currently comparing software RAID with hardware RAID and to complete our comparison, we were wondering if the following is supported by mdadm: 1) OCE: Online Capacity Expansion: From the latest version of mdadm (v2.2), it ssems that there is support for it with the -G option. How well tested is this? Also, in the Readme / Man page, it mentions: This usage causes mdadm to attempt to reconfigure a running array. This is only possibly if the kernel being used supports a particular reconfiguration. How can I know if the kernel I am using supports this reconfiguration? What if I'm compiling the kernel by hand. What options would I have to enable? 2) RAID Level Migration: Does mdadm currently support this feature? 3) Performance issues: I'm currently thinking of using either RAID 10 or LVM2 with RAID 5 to serve as a RAID server. The machine will be running either an AMD 64 processor or a dual-core AMD 64 processor, so I don't think the CPU will be a bottleneck. In fact, it should easily pass the speed of most "hardware" based RAID systems. 4) Would anyone recommend a certain hotswap enclosure? 5) Finally, I'm thinking of integrating this in a custom SAN backend. Anyone try this before? Thanks for your time. PS. Some of the terms used in the man page are a bit ambiguous. For example, what does --write-mostly refer to? Thanks for your time. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
