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

[Sebastian Pichelhofer]

Ah, I did not know it is a camera with INTERNAL HDD.

Yes makes perfect sense. All my comments assumed it is an external HDD
connected via SATA port.

Regards Sebastian

On Fri, Feb 3, 2012 at 17:16, Andrey Filippov
<support-list at support.elphel.com> wrote:
> Sebastian,
>
> 4096 byte blocks are not the problem in the 353 cameras - they all now have
> this block size. Please see our Development Blog post on that matter:
> http://blog.elphel.com/2010/11/elphel-cameras-and-4096-4k-sector-drives/
>
> And the disk was correctly formatted and tested _in the camera_ (not in the
> external computer) - it is not a good idea to try to remove it - the flex
> cable is not so easy to handle if you do not have such experience already. I
> believe Carlos should continue to follow Oleg's instructions - it was he who
> formatted and tested the HDD in the camera
>
> Andrey
>
> On Fri, Feb 3, 2012 at 8:48 AM, Sebastian Pichelhofer
> <sebastian.pichelhofer at gmail.com> wrote:
>>
>> On Fri, Feb 3, 2012 at 16:44, Carlos Padial <palidoestudio2 at gmail.com>
>> wrote:
>> >> 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?
>>
>> The SATA port on the camera is the very same connector as in any normal
>> PC.
>> If you only have a laptop you can use any external HDD (eg. USB2)
>> enclosure.
>>
>> Regards Sebastian
>>
>> >
>> >> 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
>>
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>
>