Re: HMC V2.x max USB flash drive size

2017-02-08 Thread R.S.

W dniu 2017-02-08 o 05:12, Brian Westerman pisze:

HI,

Does anyone know what the maximum USB flash drive size is you can use on the 
HMC for the Version 2.x (Linux based) HMC's?

We added some maintenance to the z13s this weekend, and when the next backup 
ran, it ended up giving us a message that it couldn't create it because it was 
larger than 4GB (which is the VFAT restriction), we reformatted it as EXT2, but 
we were wondering if there was any reason to not just go out and get a 128GB or 
256GB USB drive (or a USB hard drive) and format it as EXT2, instead of the 
small one that was provided with the z13s.  it really is a handy place to keep 
the documentation and some recovery files, but we don't want to constrict the 
backups by using space without knowing the limitations.


I expect the only restriction is EXT2 limit, which is at least 4TB (it 
depends on other factors).


BTW: If you really want to know, why don't you check it? Take any 
USB-attached HDD, format it as EXT2 and plug to HMC.


BTW2: I believe that limit for the size is not big issue, the problem 
could be with USB pendrives with some "fancy" feature like HW 
encryption, additional microSD reader, etc.

It has to be "plain" USB drive, with proper filesystem and nothing else.

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Re: HMC V2.x max USB flash drive size

2017-02-08 Thread Tom Mathias
Brian,

Parwez provided a good list of the drives that have been formally tested and 
therefore are supported.  As stated, a drive up to 32 GB is supported.  Other 
drives may or may not work.  In my personal experience I have seen most other 
drives work properly, but I have encountered some brands/types that failed to 
properly mount or otherwise work.  The issues I've seen were not related to the 
size, but instead it was specific to the brand/type.  So, to directly answer 
your question, I do not know of any explicit code to limit the size of the USB 
(although the underlying OS might), but it has to work with the underlying 
Operating System.

Regardless of the type of USB you use (one on the list or a different one), it 
is important that you follow good backup procedures, such as performing regular 
backups, using more than one device, and making sure they are kept in a safe, 
secure location.  Sadly there have been cases where only one backup was made 
and the device was either lost or turned out to be bad when it was really 
needed.  And there were other cases where regular backups were scheduled, but 
unfortunately the device was removed at some point and messages about backup 
failures were ignored and...I think you get the point.

Tom

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Re: HMC V2.x max USB flash drive size

2017-02-08 Thread Parwez Hamid
This is what's in the HMC documentation.

USB flash memory drives

If you are instructed to use a USB flash memory drive for any procedure, the 
following drives have been
tested and approved:
v P/N 22P9229 - IBM USB 2.0 High Speed Memory Key - 128 MB
v P/N 40Y8596 - Lenovo USB 2.0 Memory Key - 512 MB
v P/N 41U5118 - Lenovo USB 2.0 Security Memory Key - 1.0 GB (The security 
feature is not supported.)
v P/N 77P9278 - Smart Modular Technology (SMT) 4GB Memory Key
v P/N 77P9279 - Smart Modular Technology (SMT) 8GB Memory Key
v P/N 78P3777 - Smart Modular Technology (SMT) 32GB Memory Key

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HMC V2.x max USB flash drive size

2017-02-07 Thread Brian Westerman
HI,

Does anyone know what the maximum USB flash drive size is you can use on the 
HMC for the Version 2.x (Linux based) HMC's?

We added some maintenance to the z13s this weekend, and when the next backup 
ran, it ended up giving us a message that it couldn't create it because it was 
larger than 4GB (which is the VFAT restriction), we reformatted it as EXT2, but 
we were wondering if there was any reason to not just go out and get a 128GB or 
256GB USB drive (or a USB hard drive) and format it as EXT2, instead of the 
small one that was provided with the z13s.  it really is a handy place to keep 
the documentation and some recovery files, but we don't want to constrict the 
backups by using space without knowing the limitations.

Does anyone know or know who we can ask?  Our CE doesn't seem to know the 
answer and trial and error doesn't really make sense with a production box.

Brian

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