[cs615asa] How to read data from device

[Zhitao Chen]

Thank you all, I think I find the problem! And I think the content of
device may depend on your -r and -l filter

On Wed, May 16, 2018 at 8:30 PM, Yifang Yuan <yyuan17 at stevens.edu> wrote:

> Because we backup the data by tar, I suppose we can use tar -xf /dev/sdf
> to read
>
>
> On May 16, 2018, at 18:39, Hongkun Zhang <hzhang69 at stevens.edu> wrote:
>
> Following question, I use cat /dev/sdf command and see the file name which
> I back up use dd.  Is that mean successful backup? Thanks.
>
> Zhitao Chen <zchen69 at stevens.edu>于2018年5月16日 周三15:33写道：
>
>> I tried this, but it cannot see anything, it just let me input anything
>> endless
>>
>> On Wed, May 16, 2018 at 6:27 PM, Zhengkai Wei <zwei11 at stevens.edu> wrote:
>>
>>> I dont know how to read original data but
>>> using cat /dev/sdf can see something.
>>>
>>> > 在 2018年5月16日，下午6:22，Zhitao Chen <zchen69 at stevens.edu> 写道：
>>> >
>>> > Hi,
>>> >
>>> > Is anyone know to read data from device? I use dd(1) to try to read
>>> the data, e.g.
>>> >
>>> > # dd if=/dev/xbd3a | od -l
>>> >
>>> > but it just print 0's
>>> >
>>> > Then I tried to create a new volume and wrote some data to it, but it
>>> also print 0's
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