[Elphel-support] the problems from the hdd (in short)

[Carlos Padial]

> OK so do I understand this correctly that the new 4K block size of
> newer harddisks is the problem:
> http://en.wikipedia.org/wiki/Disk_sector ?

dont know, but this you say remember me something readed about this
digging in the list archive. But i dont fully understand if it was the
same case. it was about using ext3... and my disk was formated as
ext2... (i believe)

> Since the embedded linux in the 353 camera is already several years
> old it could well be the case that it has problems with 4K sectors.

> Carlos, one idea: Could you prepare the HDD and the partition tables
> on a PC and then see if the camera can talk to it nicely.
i am afraid i dont have this kind of conexion for this, i will look
for an adapter...
what kind of hardware i need for this?

> I do think we should put a notice on the wiki about the 4K sector
> problem once we have a full understanding, and probably recommend
> customers to not use/or use with caution 4K HDDs for now.

Yes, i think this shoud be done. But i have not full understanding of
the problem yet.

So there is no other way?

Thanks oleg and sebastian for your support.

> Regards Sebastian
>
> On Fri, Feb 3, 2012 at 14:28, Carlos Padial <palidoestudio2 at gmail.com> wrote:
>> Thanks to oleg who kindly help me a lot yesterday, we have narrow down
>> the problem to this one:
>>
>> # fdisk -l
>>
>> Note: sector size is 4096 (not 512)
>>
>> Disk /dev/hda: 120.0 GB, 120034123776 bytes
>> 255 heads, 63 sectors/track, 1824 cylinders
>> Units = cylinders of 16065 * 4096 = 65802240 bytes
>>
>> Disk /dev/hda doesn't contain a valid partition table
>>
>> So i need to make a new partition table.
>> I found about fix tables with cfdisk but seems its not installed
>> With the -o option in fdisk the changes seems not  to be applied at all...
>>
>> someone knows how to proceed?
>>
>> best regards.
>> --
>> Carlos Padial
>> surreal.asturnazari.es



-- 
Carlos Padial
surreal.asturnazari.es