Release 2.6
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Neil Brown
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ANNOUNCE-2.6
76
ANNOUNCE-2.6
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Subject: ANNOUNCE: mdadm 2.6 - A tool for managing Soft RAID under Linux
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I am pleased to announce the availability of
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mdadm version 2.6
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It is available at the usual places:
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http://www.cse.unsw.edu.au/~neilb/source/mdadm/
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and
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countrycode=xx.
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http://www.${countrycode}kernel.org/pub/linux/utils/raid/mdadm/
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and via git at
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git://neil.brown.name/mdadm
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http://neil.brown.name/git?p=mdadm
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mdadm is a tool for creating, managing and monitoring
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device arrays using the "md" driver in Linux, also
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known as Software RAID arrays.
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Release 2.6 adds assorted fixes and improvements and a new major mode.
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"Incremental Assembly" via -I or --incremental can be used to
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assemble an array one device at a time. The idea is that you get
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udev to run "mdadm -Iq devicename" on each new block device that it
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finds. Anything that is part of an array gets included in an array as
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appropriate.
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Two special notes:
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1/ This is very new code and is probably buggy. It passes a few basic
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tests, and helped me find some kernel bugs, but it is still fresh
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and should not be considered 'stable'. Please test and provide
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feedback.
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2/ There is a bug in the linux kernel that makes incremental assembly
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not possible in general (you cannot safely remove a drive from an array
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that has not yet been started. This is needed if an old device was
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detected first). If mdadm detects a kernel which might have the
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bug, it rejects --incremental requests.
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The bug will hopefully be fixed in 2.6.20 and this mdadm release
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contains patches for 2.6.18, 2.6.18.6 and 2.6.19. Apply the
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appropriate patch to test --incremental.
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Changelog Entries:
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- Fixed UUID printing in "--detail --brief" for version1 metadata.
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- --update=resync did exactly the wrong thing for version1 metadata.
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It caused a resync to not happen, rather than to happen.
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- Allow --assemble --force to mark a raid6 clean when it has two
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missing devices (which is needed else if won't assemble.
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Without this fix it would only assemble if one or zero
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missing devices.
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- Support --update=devicesize for cases where the underlying device
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can change size.
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- Default to --auto=yes so the array devices with 'standard' names
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get created automatically, as this is almost always what is wanted.
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- Give useful message if raid4/5/6 cannot be started because it is
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not clean and is also degraded.
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- Increase raid456 stripe cache size if needed to --grow the array.
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The setting used unfortunately requires intimate knowledge of the
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kernel, and it not reset when the reshape finishes.
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- Change 'Device Size' to 'Used Dev Size' because it only shows how
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much of each device is actually used, not how big they are.
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- --wait or -W will wait for resync activity to finish on the given
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devices.
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- Fix some problems with --update=uuid and add a test.
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- If two drives in a raid5 disappear at the same time, then "-Af"
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will add them both in rather than just one and forcing the array
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to 'clean'. This is slightly safer in some cases.
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- Check device is large enough before hot-add: this improves quality
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of error message.
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- Don't hold md device open for so long in --monitor mode - map_dev
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can be slow and interferes with trying to stop the array.
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- Support --uuid= with --create to choose your own UUID.
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- New major more "--incremental" for incremental assemble of arrays,
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intended for use with udev.
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Development of mdadm is sponsored by
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SUSE Labs, Novell Inc.
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NeilBrown 21st December 2006
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Blessed Christmas to all.
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@ -1,4 +1,4 @@
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Changes Prior to this release
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Changes Prior to 2.6 release
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- Fixed UUID printing in "--detail --brief" for version1 metadata.
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- --update=resync did exactly the wrong thing for version1 metadata.
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It caused a resync to not happen, rather than to happen.
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@ -391,6 +391,7 @@ int Incremental(char *devname, int verbose, int runstop,
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/* 7/ Is there enough devices to possibly start the array? */
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/* 7a/ if not, finish with success. */
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avail = NULL;
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active_disks = count_active(st, mdfd, &avail, &info);
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if (enough(info.array.level, info.array.raid_disks,
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info.array.layout, info.array.state & 1,
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@ -338,7 +338,7 @@ int Monitor(mddev_dev_t devlist,
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close(fd);
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for (i=0; i<MaxDisks; i++) {
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mdu_disk_info_t disc;
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mdu_disk_info_t disc = {0};
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int newstate=0;
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int change;
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char *dv = NULL;
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2
ReadMe.c
2
ReadMe.c
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@ -29,7 +29,7 @@
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#include "mdadm.h"
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char Version[] = Name " - v2.5.6 - 9 November 2006\n";
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char Version[] = Name " - v2.6 - 21 December 2006\n";
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/*
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* File: ReadMe.c
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@ -14,6 +14,7 @@ ANNOUNCE-2.5.3
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ANNOUNCE-2.5.4
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ANNOUNCE-2.5.5
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ANNOUNCE-2.5.6
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ANNOUNCE-2.6
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Assemble.c
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bitmap.c
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bitmap.h
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@ -27,12 +28,17 @@ dlink.c
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dlink.h
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Examine.c
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Grow.c
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Incremental.c
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INSTALL
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inventory
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kernel-patch-2.6.18
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kernel-patch-2.6.18.6
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kernel-patch-2.6.19
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Kill.c
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makedist
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Makefile
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Manage.c
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mapfile.c
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md.4
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md5.h
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mdadm.8
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@ -102,6 +108,7 @@ tests/05r6-bitmapfile
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tests/06name
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tests/06r5swap
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tests/06sysfs
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tests/06update-uuid
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tests/06wrmostly
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tests/07testreshape5
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tests/check
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2
mdadm.8
2
mdadm.8
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@ -5,7 +5,7 @@
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''' the Free Software Foundation; either version 2 of the License, or
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''' (at your option) any later version.
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''' See file COPYING in distribution for details.
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.TH MDADM 8 "" v2.5.6
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.TH MDADM 8 "" v2.6
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.SH NAME
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mdadm \- manage MD devices
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.I aka
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@ -1,6 +1,6 @@
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Summary: mdadm is used for controlling Linux md devices (aka RAID arrays)
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Name: mdadm
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Version: 2.5.6
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Version: 2.6
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Release: 1
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Source: http://www.cse.unsw.edu.au/~neilb/source/mdadm/mdadm-%{version}.tgz
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URL: http://www.cse.unsw.edu.au/~neilb/source/mdadm/
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@ -1,5 +1,5 @@
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.\" -*- nroff -*-
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.TH MDASSEMBLE 8 "" v2.5.6
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.TH MDASSEMBLE 8 "" v2.6
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.SH NAME
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mdassemble \- assemble MD devices
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.I aka
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6
super0.c
6
super0.c
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@ -703,7 +703,6 @@ static int load_super0(struct supertype *st, int fd, void **sbp, char *devname)
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* 1 on cannot get superblock
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* 2 on superblock meaningless
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*/
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unsigned long size;
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unsigned long long dsize;
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unsigned long long offset;
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mdp_super_t *super;
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if (dsize < MD_RESERVED_SECTORS*512 * 2) {
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if (devname)
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fprintf(stderr, Name ": %s is too small for md: size is %ld sectors.\n",
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devname, size);
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fprintf(stderr, Name
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": %s is too small for md: size is %llu sectors.\n",
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devname, dsize);
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return 1;
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}
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