X-Git-Url: https://code.delx.au/refind/blobdiff_plain/6d17b495509b1b942ae4d8ddef6cc07109ab40f8..2a6ed1155086a30aaa01ced44b559183e7521083:/docs/refind/drivers.html
diff --git a/docs/refind/drivers.html b/docs/refind/drivers.html
index 38460fc..1913978 100644
--- a/docs/refind/drivers.html
+++ b/docs/refind/drivers.html
@@ -15,10 +15,10 @@
href="mailto:rodsmith@rodsbooks.com">rodsmith@rodsbooks.com
Originally written: 4/19/2012; last Web page update:
-1/3/2014, referencing rEFInd 0.7.7
+5/15/2014, referencing rEFInd 0.8.1
-I'm a technical writer and consultant specializing in Linux technologies. This Web page is provided free of charge and with no annoying outside ads; however, I did take time to prepare it, and Web hosting does cost money. If you find this Web page useful, please consider making a small donation to help keep this site up and running. Thanks!
+This Web page is provided free of charge and with no annoying outside ads; however, I did take time to prepare it, and Web hosting does cost money. If you find this Web page useful, please consider making a small donation to help keep this site up and running. Thanks!
@@ -207,29 +207,36 @@ href="mailto:rodsmith@rodsbooks.com">rodsmith@rodsbooks.com
href="https://github.com/falstaff84/rEFInd">modified the rEFIt/rEFInd
ext2fs driver so that it could handle ext4fs. I'm including this as
a separate driver from the ext2fs driver, although the ext4fs version
- can handle ext2fs and ext3fs, too. (I may eventually retire the
- original ext2fs driver, but I want to be conservative about this in
- case there's an undiscovered problem with the new driver.) This driver
- has some limitations. Most notably, for various reasons it maxes out at
- 16TiB and won't mount any ext4 filesystem that's larger than this. As
- of version 0.6.1, this driver supports the meta_bg feature,
- which can also be used on ext2fs and ext3fs. Thus, it can handle some
- ext2fs and ext3fs partitions that the ext2fs driver can't handle. You
- can learn about your ext2/3/4 filesystem features by typing /boot partition and ext4fs on your root (/)
+ partition, to have the EFI scan only the former. This driver has some
+ limitations. Most notably, for various reasons it maxes out at 16TiB
+ and won't mount any ext4 filesystem that's larger than this. As of
+ version 0.6.1, this driver supports the meta_bg feature, which
+ can also be used on ext2fs and ext3fs. Thus, it can handle some ext2fs
+ and ext3fs partitions that the ext2fs driver can't handle. You can
+ learn about your ext2/3/4 filesystem features by typing dumpe2fs /dev/sda2 | grep features,
changing /dev/sda2 to your
filesystem's device.
Btrfs—Samuel Liao contributed this driver, which is
based on the rEFIt/rEFInd driver framework and algorithms from the GRUB
- 2.0 Btrfs driver. As of rEFInd 0.7.0, this driver is new and should be
- considered experimental. I've tested this driver with a simple
- one-partition filesystem and with a filesystem that spans two physical
- devices (although I've made no attempt to ensure that the driver can
- actually read files written to both devices). Lamuel Liao has used the
- driver with a compressed Btrfs volume. I don't know if the driver will
- handle other advanced Btrfs features, such as snapshots and
- subvolumes.
+ 2.0 Btrfs driver. I've tested this driver with a simple one-partition
+ filesystem and with a filesystem that spans two physical devices
+ (although I've made no attempt to ensure that the driver can actually
+ read files written to both devices). Lamuel Liao has used the driver
+ with a compressed Btrfs volume. The driver will handle subvolumes, but
+ you may need to add kernel options if you're booting a Linux kernel
+ directly from a filesystem that uses subvolumes. For instance, on a
+ test installation of Ubuntu 14.04 alpha on such a system, I needed to
+ set also_scan_dirs + @/boot in refind.conf and add
+ rootflags=subvol=@ to the kernel options in my
+ refind_linux.conf file. Without the first of these options,
+ rEFInd could not locate my kernel; and without the second, the boot
+ failed with a message to the effect that the initial RAM disk could not
+ find /sbin/init.
ISO-9660—This driver originated with rEFIt's author, but
he never released a final version. Its code was improved by Oracle for