copy full system from old disk to a new one

[Reindl Harald]

Am 19.02.2013 20:59, schrieb Gordan Bobic:
> On 19/02/2013 19:42, Reindl Harald wrote:
>>
>>
>> Am 19.02.2013 20:24, schrieb Gordan Bobic:
>>> On 19/02/2013 19:05, Reindl Harald wrote:
>>>>
>>>>
>>>> Am 19.02.2013 20:02, schrieb Gordan Bobic:
>>>>>> what exactly do you need to align on the partitions?
>>>>>
>>>>> For a start, making sure your RAID implementation puts the metadata
>>>>> at the end of the disk, rather than the beginning.
>>>>
>>>> "my RAID implementation"?
>>>> LINUX SOFTWARE RAID
>>>>
>>>> and this is how the raid-partitions are looking
>>>> no problem since years
>>>>
>>>> Disk /dev/sda: 2000.4 GB, 2000398934016 bytes, 3907029168 sectors
>>>> Units = sectors of 1 * 512 = 512 bytes
>>>> Sector size (logical/physical): 512 bytes / 512 bytes
>>>> I/O size (minimum/optimal): 512 bytes / 512 bytes
>>>> Disk identifier: 0x0000ae2c
>>>>      Device Boot      Start         End      Blocks   Id  System
>>>> /dev/sda1   *        2048     1026047      512000   fd  Linux raid autodetect
>>>> /dev/sda2         1026048    31746047    15360000   fd  Linux raid autodetect
>>>> /dev/sda3        31746048  3906971647  1937612800   fd  Linux raid autodetect
>>>>
>>>> [root at srv-rhsoft:/downloads]$ sfdisk -d /dev/sda
>>>> # partition table of /dev/sda
>>>> unit: sectors
>>>> /dev/sda1 : start=     2048, size=  1024000, Id=fd, bootable
>>>> /dev/sda2 : start=  1026048, size= 30720000, Id=fd
>>>> /dev/sda3 : start= 31746048, size=3875225600, Id=fd
>>>> /dev/sda4 : start=        0, size=        0, Id= 0
>>>
>>> That's the MD partition alignment, not the alignment of the FS space within the MD device. The two are not the
>>> same.
>>
>> maybe you should read older posts in the thread
> 
> Looking for what, exactly?
> 
>> [root at srv-rhsoft:/downloads]$ tune2fs -l /dev/md1
> [...]
> This won't tell you the FS alignment against the raw underlying disk sectors.
> 
>> Blocks per group:         32768
> 
> This is sub-optimal in almost all cases except RAID1 or single-disk, as I explained earlier

how do you meassure "sub-optimal"?

the time wasted to re-install a complex setup and start configuration
from scratch, especially if you have more than one clones of the same
machine will never be worth 1,2.3% of theoretical performance

so i do not give a damn about a few percent and as long SSD's are
way to expensive to store some TB in RAID setups they are no
option and if they are at a valid price they are free from
early-adopters problems

as said: NOW i would not save any important data on a SSD
and i do not own any unimportant data beause if it is
unimportant i go ahead and delete it at all

maybe you install from scratch regulary
i do never and i am on board since Fedora Core 3

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 263 bytes
Desc: OpenPGP digital signature
URL: <http://lists.fedoraproject.org/pipermail/users/attachments/20130219/a471d66e/attachment.sig>