Ryan Lum wrote:
Adaptec 1210SA with a RAID 0 Intel 815 based mobo 512mb ram
During the install, Disk Druid or whatever the partition utility is, sees the first disk but says the other disk is not initialized and only reports 150MB when the array is 300MB. How do I get the CentOS installer to see the RAID 0 array correctly?
Adaptec 1210SA is not real RAID controller. It is not RAID controller at all. It is fake. Under Windows it uses driver that implements RAID in software. Under Linux there is already software RAID driver provided by the OS, so this functionality from Windows driver is not needed. If you look more closely to wording, you'll see that Adaptec calls this controller "HostRAID". HostRAID is just Adaptec's word for fake RAID controllers. It implies that RAID functionallity is provided by "host's" operating system in software.
If this is Linux-only box (not dual-boot with Windows), simply disable RAID in BIOS (which is fake anyhow), and use card as what it really is, just an ordinary SATA controller. Configure software RAID using standard Linux software raid driver. If you still can do it, replace card with cheaper 1205SA. The difference between 1205SA and 1210SA is that former doesn't have fake RAID BIOS, and Windows device driver for it has software RAID functionality disabled. Other than that, they seem to be exactly the same card. You'll save yourself $25.
If it is dual-boot box, fake-RAID is still not supported at installation time. If you are very experienced user (read: expert, wizard, guru), there is dmraid utility that can read out RAID configuration from the drives (the RAID configuration from the BIOS) and configure device mapper appropriately. Otherwise, you won't be able to use fake RAID functionality in Windows either.