* Linux/MacOSX RAID5 dual boot
@ 2010-07-08 1:18 Marek
0 siblings, 0 replies; 6+ messages in thread
From: Marek @ 2010-07-08 1:18 UTC (permalink / raw)
To: linux-raid
Hi,
I apologize if this has been asked before. I would like to run a dual
boot MacOSX/Linux system. I suppose that if I setup a 4-disk RAID5
system via mdadm, MacOSX won't be able to access it. Can mdadm be run
succesfully on a MacOSX and if not, has a port been considered?
thanks,
Marek
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Linux/MacOSX RAID5 dual boot
@ 2010-07-09 11:57 Marek
0 siblings, 0 replies; 6+ messages in thread
From: Marek @ 2010-07-09 11:57 UTC (permalink / raw)
To: Neil Brown; +Cc: linux-raid
On 9.7.2010, at 13:29, Neil Brown <neilb@suse.de> wrote:
> On Fri, 9 Jul 2010 13:15:00 +0200
> Marek <mlf.conv@gmail.com> wrote:
>
>> Hi Neil,
>>
>> thanks for your answer. Do I understand it correctly that porting the
>> md driver wouldn't be an option either?
>
> No, not really an option.
> Darwin is sufficiently different from Linux that it would really
> mean writing
> a RAID5 driver for Darwin using md as a guide. You could probably
> borrow
> some code (if the license allowed it which I doubt) but a very large
> amount
> would need to be written from scratch.
thanks for the information. It seems that a software RAID solution
(other than RAID1 or RAID0) for OSX doesn't exist. I was only able to
find SoftRAID which has some interesting features that are probably
outside the scope of mdadm, but they don't even support RAID5 yet.
Marek
>
>
>>
>> Marek
>>
>> On 9.7.2010, at 12:22, Neil Brown <neilb@suse.de> wrote:
>>
>>> On Fri, 9 Jul 2010 12:07:56 +0200
>>> Marek <mlf.conv@gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> it seems that my email has hit top 5 ranking on google when
>>>> searching
>>>> for "mdadm macosx", but it seems that due to some heavy
>>>> discussion on
>>>> this mailing list it probably went unnoticed.
>>>> I would like to ask if someone would be able to elaborate whether
>>>> there is a possibility that mdadm would run on Darwin and if so,
>>>> whether a port would require a substantial rewrite.
>>>
>>> mdadm would not run on Darwin. It only works with the 'md' driver
>>> which is
>>> only in Linux.
>>>
>>> If you want both Linux and Darwin to be able to access the same
>>> software RAID
>>> array, you would need to find a format that both understand.
>>> Probably the easiest way would be do discover how MAC OSX formats
>>> RAID array
>>> and write support for that in mdadm. Far from trivial, but probably
>>> possible.
>>>
>>> A quick google suggest that RAID5 is not supported in OSX, so that
>>> would not
>>> be an option.
>>>
>>> NeilBrown
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Linux/MacOSX RAID5 dual boot
2010-07-09 11:15 ` Marek
@ 2010-07-09 11:29 ` Neil Brown
0 siblings, 0 replies; 6+ messages in thread
From: Neil Brown @ 2010-07-09 11:29 UTC (permalink / raw)
To: Marek; +Cc: linux-raid
On Fri, 9 Jul 2010 13:15:00 +0200
Marek <mlf.conv@gmail.com> wrote:
> Hi Neil,
>
> thanks for your answer. Do I understand it correctly that porting the
> md driver wouldn't be an option either?
No, not really an option.
Darwin is sufficiently different from Linux that it would really mean writing
a RAID5 driver for Darwin using md as a guide. You could probably borrow
some code (if the license allowed it which I doubt) but a very large amount
would need to be written from scratch.
NeilBrown
>
> Marek
>
> On 9.7.2010, at 12:22, Neil Brown <neilb@suse.de> wrote:
>
> > On Fri, 9 Jul 2010 12:07:56 +0200
> > Marek <mlf.conv@gmail.com> wrote:
> >
> >> Hi,
> >>
> >> it seems that my email has hit top 5 ranking on google when searching
> >> for "mdadm macosx", but it seems that due to some heavy discussion on
> >> this mailing list it probably went unnoticed.
> >> I would like to ask if someone would be able to elaborate whether
> >> there is a possibility that mdadm would run on Darwin and if so,
> >> whether a port would require a substantial rewrite.
> >
> > mdadm would not run on Darwin. It only works with the 'md' driver
> > which is
> > only in Linux.
> >
> > If you want both Linux and Darwin to be able to access the same
> > software RAID
> > array, you would need to find a format that both understand.
> > Probably the easiest way would be do discover how MAC OSX formats
> > RAID array
> > and write support for that in mdadm. Far from trivial, but probably
> > possible.
> >
> > A quick google suggest that RAID5 is not supported in OSX, so that
> > would not
> > be an option.
> >
> > NeilBrown
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Linux/MacOSX RAID5 dual boot
2010-07-09 10:22 ` Neil Brown
@ 2010-07-09 11:15 ` Marek
2010-07-09 11:29 ` Neil Brown
0 siblings, 1 reply; 6+ messages in thread
From: Marek @ 2010-07-09 11:15 UTC (permalink / raw)
To: Neil Brown; +Cc: linux-raid
Hi Neil,
thanks for your answer. Do I understand it correctly that porting the
md driver wouldn't be an option either?
Marek
On 9.7.2010, at 12:22, Neil Brown <neilb@suse.de> wrote:
> On Fri, 9 Jul 2010 12:07:56 +0200
> Marek <mlf.conv@gmail.com> wrote:
>
>> Hi,
>>
>> it seems that my email has hit top 5 ranking on google when searching
>> for "mdadm macosx", but it seems that due to some heavy discussion on
>> this mailing list it probably went unnoticed.
>> I would like to ask if someone would be able to elaborate whether
>> there is a possibility that mdadm would run on Darwin and if so,
>> whether a port would require a substantial rewrite.
>
> mdadm would not run on Darwin. It only works with the 'md' driver
> which is
> only in Linux.
>
> If you want both Linux and Darwin to be able to access the same
> software RAID
> array, you would need to find a format that both understand.
> Probably the easiest way would be do discover how MAC OSX formats
> RAID array
> and write support for that in mdadm. Far from trivial, but probably
> possible.
>
> A quick google suggest that RAID5 is not supported in OSX, so that
> would not
> be an option.
>
> NeilBrown
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Linux/MacOSX RAID5 dual boot
2010-07-09 10:07 Marek
@ 2010-07-09 10:22 ` Neil Brown
2010-07-09 11:15 ` Marek
0 siblings, 1 reply; 6+ messages in thread
From: Neil Brown @ 2010-07-09 10:22 UTC (permalink / raw)
To: Marek; +Cc: linux-raid
On Fri, 9 Jul 2010 12:07:56 +0200
Marek <mlf.conv@gmail.com> wrote:
> Hi,
>
> it seems that my email has hit top 5 ranking on google when searching
> for "mdadm macosx", but it seems that due to some heavy discussion on
> this mailing list it probably went unnoticed.
> I would like to ask if someone would be able to elaborate whether
> there is a possibility that mdadm would run on Darwin and if so,
> whether a port would require a substantial rewrite.
mdadm would not run on Darwin. It only works with the 'md' driver which is
only in Linux.
If you want both Linux and Darwin to be able to access the same software RAID
array, you would need to find a format that both understand.
Probably the easiest way would be do discover how MAC OSX formats RAID array
and write support for that in mdadm. Far from trivial, but probably possible.
A quick google suggest that RAID5 is not supported in OSX, so that would not
be an option.
NeilBrown
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Linux/MacOSX RAID5 dual boot
@ 2010-07-09 10:07 Marek
2010-07-09 10:22 ` Neil Brown
0 siblings, 1 reply; 6+ messages in thread
From: Marek @ 2010-07-09 10:07 UTC (permalink / raw)
To: Marek; +Cc: linux-raid
Hi,
it seems that my email has hit top 5 ranking on google when searching
for "mdadm macosx", but it seems that due to some heavy discussion on
this mailing list it probably went unnoticed.
I would like to ask if someone would be able to elaborate whether
there is a possibility that mdadm would run on Darwin and if so,
whether a port would require a substantial rewrite.
thanks,
Marek
On 8.7.2010, at 3:18, Marek <mlf.conv@gmail.com> wrote:
> Hi,
>
> I apologize if this has been asked before. I would like to run a
> dual boot MacOSX/Linux system. I suppose that if I setup a 4-disk
> RAID5 system via mdadm, MacOSX won't be able to access it. Can mdadm
> be run succesfully on a MacOSX and if not, has a port been considered?
>
> thanks,
>
> Marek
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2010-07-09 11:57 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2010-07-08 1:18 Linux/MacOSX RAID5 dual boot Marek
2010-07-09 10:07 Marek
2010-07-09 10:22 ` Neil Brown
2010-07-09 11:15 ` Marek
2010-07-09 11:29 ` Neil Brown
2010-07-09 11:57 Marek
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