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F10: devicemapper raid not seen in installer



After a few succesful Fedora 10 installs, I tried to install my main
machine which has 3 harddisks, 1 SATA disk (sda) for the system and a
data partition, and 2 sata disks in RAID1, set through the bios (Intel
chipset, raid bios reports as Intel Matrix Storage Manager option ROM
v7.6.0.1011 ICH9R wRAID5) which in Fedora 8 was handled by device mapper:
$ df /home
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/isw_edcfaihjg_Volume0p1
                     473078128 106809904 341849428  24% /home

However, when starting a fresh install of Fedora 10 (I wanted to keep
/home and /data, but reformat the other partitions), no RAID was seen;
anaconda just reports 3 SATA disks, sa, sdb and sdc, and sdb and sdc
both contain 1 ext3 partion, both labeled /home , according to anaconda.

Is there some additional magic or boot option needed to enable
devicemapper during a reinstall? I couldn't find anything in the release
notes that could indicate that this behaviour has changed.

David Jansen

PS: in case it helps, architecture is x86_64; system is a HP xw4600, cpu
reports as Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz


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