On 11/17/2013 12:15 PM, Tanstaafl wrote: > On 2013-11-12 4:55 PM, Tanstaafl <tansta...@libertytrek.org> wrote: >>> Depending on your system, you might want to add one or more of the >>> following options: >>> Option Description >>> --disklabel Add support for LABEL= settings in your /etc/fstab >>> --dmraid Add support for fake hardware RAID >>> --firmware Add in firmware code found on the system >>> --gpg Add in GnuPG support >>> --iscsi Add support for iSCSI >>> --luks Add support for luks encryption containers >>> --lvm Add support for LVM >>> --mdadm Add support for software RAID >>> --multipath Add support for multiple I/O access towards a SAN >>> --zfs Add support for ZFS >> >> So, are these *all* of the potential options? If so, then I can probably >> safely say that all I need is lvm... >
these options say do additional tasks. i.e. initialise lvm volume groups or search and start all mdraid devices. or all of the above. you only need lvm if root/usr is on lvm. you only need mdadm if root/usr is on a mdraid if your root/usr is on a normal device like /dev/sda3 but all data drives are on lvm then you still do not need these options. they are just what to do in the initramfs to get root mounted. > Never got a response to this... > > Maybe I can ask another way... > > Is this a complete list of the items that may break BOOTING? I > understand now that you can add pretty much any drivers that you want, > but on my server (that has the separate /usr), modules are disabled > and so I have every driver and filesystem built into the kernel. > > Going just by the above list of items, the only thing I use is lvm, so > I'm guessing (I *hate* guessing) that this is the only thing I need in > my initramfs. > do you have kernel modules that are not compiled into the kernel in order to mount root ? i.e. is root on ext4 and ext4 is <M> in menuconfig i.e. is root on an adaptec scsi card and the scsi drivers is <M> in menuconfig then you need to edit genkernel's modules_load https://forums.gentoo.org/viewtopic-t-497370.html for split /usr check out initramfs.mounts http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-kernel/genkernel/files/initramfs.mounts?view=markup i don't do this so can't comment if it works, maybe someone else can? > Another question - is there any reason I couldn't just enable > everything just in case? Or could that cause other problems? > if you have them selected anyway, it jus tmakes the boot process slower as it scans for raid devices to find none.. > On 2013-11-12 5:54 PM, Neil Bothwick <n...@digimed.co.uk> wrote: > > There is a very capable tool for examining your system and deciding > > what is needed... you. > > Yes, but again, I have never had to worry about this - EVER - in the > past. The question simply never came up. > > Now, I am being FORCED to worry about it... and I want to understand > it as much as possible. > hope this helps
