| 2010-03-30 14:12:01 |
ceg |
bug |
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added bug |
| 2010-03-30 14:13:07 |
ceg |
bug task added |
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linux (Ubuntu) |
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| 2010-03-30 14:14:22 |
ceg |
description |
Binary package hint: mdadm
Ubutus current kernel option
CONFIG_MD_AUTODETECT=y
enables the kernel's RAID autodetection during boot.
Aside from causing a delay for everyone this often also disturbs the udev/mdadm setup of raid devices in the system.
(i.e. devices partly busy/set up without an entry in the mapfile used by mdadm --incremental)
Here is what README.initrams from mdadm tarball says about the kernel's raid autodetection feature:
"while useful, [they] do not provide complete functionality
and are unlikely to be extended. The preferred way to assemble md
arrays at boot time is using 'mdadm' "
Ubuntu does this using udev rules in initramfs as well as later on.
The kernel's raid autodetection should therefore be disabled in ubuntu kernels. |
Ubuntu's current kernel option
CONFIG_MD_AUTODETECT=y
enables the kernel's RAID autodetection during boot.
Aside from causing a delay for everyone this often also disturbs the udev/mdadm setup of raid devices in the system.
(i.e. devices partly busy/set up without an entry in the mapfile used by mdadm --incremental)
Here is what README.initrams from mdadm tarball says about the kernel's raid autodetection feature:
"while useful, [they] do not provide complete functionality
and are unlikely to be extended. The preferred way to assemble md
arrays at boot time is using 'mdadm' "
Ubuntu does this using udev rules in initramfs as well as later on.
The kernel's raid autodetection should therefore be disabled in ubuntu kernels.
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| 2010-03-30 14:19:36 |
ceg |
summary |
enabled kernel raid autodetection disturbs initramfs |
enabled kernel raid autodetection disturbs udev/mdadm (initramfs & later) |
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| 2010-03-31 06:04:09 |
Jeremy Foshee |
tags |
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kernel-series-unknown |
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| 2010-04-29 14:52:31 |
Jeremy Foshee |
tags |
kernel-series-unknown |
kernel-series-unknown needs-kernel-logs |
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| 2010-04-29 14:52:36 |
Jeremy Foshee |
tags |
kernel-series-unknown needs-kernel-logs |
kernel-series-unknown needs-kernel-logs needs-upstream-testing |
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| 2010-04-29 14:52:39 |
Jeremy Foshee |
tags |
kernel-series-unknown needs-kernel-logs needs-upstream-testing |
kernel-series-unknown kj-triage needs-kernel-logs needs-upstream-testing |
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| 2010-04-29 14:53:32 |
Jeremy Foshee |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2010-05-06 12:59:12 |
ceg |
linux (Ubuntu): status |
Incomplete |
New |
|
| 2010-05-06 13:00:38 |
ceg |
linux (Ubuntu): status |
New |
Confirmed |
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| 2010-05-17 06:56:08 |
ceg |
tags |
kernel-series-unknown kj-triage needs-kernel-logs needs-upstream-testing |
kernel-config |
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| 2010-05-17 07:05:36 |
ceg |
description |
Ubuntu's current kernel option
CONFIG_MD_AUTODETECT=y
enables the kernel's RAID autodetection during boot.
Aside from causing a delay for everyone this often also disturbs the udev/mdadm setup of raid devices in the system.
(i.e. devices partly busy/set up without an entry in the mapfile used by mdadm --incremental)
Here is what README.initrams from mdadm tarball says about the kernel's raid autodetection feature:
"while useful, [they] do not provide complete functionality
and are unlikely to be extended. The preferred way to assemble md
arrays at boot time is using 'mdadm' "
Ubuntu does this using udev rules in initramfs as well as later on.
The kernel's raid autodetection should therefore be disabled in ubuntu kernels.
|
Ubuntu still uses the kernel option
CONFIG_MD_AUTODETECT=y
thus enables the kernel's RAID autodetection during boot.
However, aside from causing a delay for everyone, this often also disturbs the udev/mdadm setup when raid devices are present in the system.
(i.e. devices are partly busy/set up by the kernel, without an entry in the mapfile used by mdadm --incremental)
Here is what README.initrams from mdadm tarball says about the kernel's raid autodetection features:
"while useful, [they] do not provide complete functionality
and are unlikely to be extended. The preferred way to assemble md
arrays at boot time is using 'mdadm' "
Ubuntu does assemble arrays using udev rules that run mdadm. (In initramfs as well as later on.)
The kernel's raid autodetection can and should therefore be disabled in ubuntu kernels.
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| 2010-05-30 09:23:53 |
ceg |
summary |
enabled kernel raid autodetection disturbs udev/mdadm (initramfs & later) |
boot delay and udev/mdadm disturbance (obsolete kernel raid autodetection) |
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| 2010-10-21 09:26:48 |
webworm |
bug |
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added subscriber webworm |
| 2011-02-20 23:41:13 |
jhfhlkjlj |
bug |
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added subscriber Chauncellor |
| 2011-04-14 21:04:39 |
donarntz |
bug |
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added subscriber donarntz |
| 2011-04-15 07:37:05 |
ceg |
mdadm (Ubuntu): status |
New |
Confirmed |
|
| 2011-04-15 07:43:00 |
ceg |
summary |
boot delay and udev/mdadm disturbance (obsolete kernel raid autodetection) |
boot delay and udev/mdadm (raid) disturbance (obsolete MD_AUTODETECT=y) |
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| 2011-11-27 23:14:41 |
Jean-Philippe Guérard |
bug |
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added subscriber Jean-Philippe Guérard |
| 2012-05-05 23:25:53 |
Jean-Philippe Guérard |
marked as duplicate |
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942106 |
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| 2012-05-06 00:17:53 |
ceg |
removed duplicate marker |
942106 |
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| 2012-05-06 00:28:19 |
ceg |
summary |
boot delay and udev/mdadm (raid) disturbance (obsolete MD_AUTODETECT=y) |
MD_AUTODETECT=y is obsolete (boot delay and udev/mdadm (raid) disturbance) |
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| 2012-05-06 00:29:10 |
ceg |
summary |
MD_AUTODETECT=y is obsolete (boot delay and udev/mdadm (raid) disturbance) |
MD_AUTODETECT=y kernel option is obsolete (boot delay and udev/mdadm (raid) disturbance) |
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| 2012-05-06 20:13:25 |
ceg |
mdadm (Ubuntu): status |
Confirmed |
Invalid |
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| 2012-05-06 20:13:38 |
ceg |
linux (Ubuntu): status |
Confirmed |
Invalid |
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