Sorry, I missed the request sent earlier this year to provide more info and
test with 10.04.
Anyway, the problem still exists in the latest ubuntu kernel, and I know
exactly why.
It is udev that has an unfinished implementation regarding SAS drives.
Between version 142 and 143 of udev, there was an overhaul made. Earlier, the
population of links under /dev/disks/by-path was made by a scrips 'path_id'.
But that was changed in version 143, and is now implemented in C (for
performance I could imagine...)
The function handling SAS is currently (from version 143 and onwards)
implemented as
static struct udev_device *handle_scsi_sas(struct udev_device *parent, char
**path)
{
return NULL;
}
Therefore, SAS is unhandled in all kernels using udev >142
Thanks
** Changed in: linux (Ubuntu)
Status: Expired => New
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Using Marvell SAS HBA, /dev/disk/by-path is not populated correctly
https://bugs.launchpad.net/bugs/430894
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