Re: [Re: OFF TOPIC: OS/400 V4Rx command ref] -- LINUX5250

Steve,

Actually the single level store refers to more than that.  It allows the
entire disk space to look as if it were a single disk.  This as opposed to the
requirement to address the "c-drive" etc.  IBM later discovered that there was
an advantage to allowing the multiple level storage and so added the ability
to divide up groups of disks into separate auxillary storage pools, ASPs.  It
is actually very nice and requires dramatically less management of disk space
than other systems I have worked with.

Mike Fee




stevefx@us.ibm.com wrote:
I'm no expert but here's a quick overview on how I see the OS/400 file
system. NOTE: This is all my own information, nothing official from IBM.
I'm just a dork who works on a LPP.

The normal library file system is commonly referred to as a single-level
store. You can basically think of it as a file system which only allows
directories, but no subdirectories. Someone once told me that part of the
design was supposed to make it easy so that you never need to know where
the data is physically stored, whether on disk or in memory...I'm sure it
gets much more technical than this ;0). There is also a "magic" root
library, QSYS, which all the others are stored within. I suppose you could
call this the QSYS file system or something.

There is also a folder-style file system which is not frequently used. I'm
not sure the technical name, but in it you store Document Library Objects
(DLOs). It acts like a DOS filesystem. Many people use it for backing up
their PC files to. This is the QDLS file system. It can be traversed using
the WRKFLR command, but you have to be enrolled in some directory services
thing first.

Now the cool one is IFS (Integrated File System). It's a *NIX-style file
system which programs like Domino use. You can traverse it by using the
WRKLNK command. The QSYS and QDLS file systems are available from IFS in
the /QSYS and /QDLS directories, respectively.

There is also NetWare filesystem support which is reachable via IFS as
well. There are probably others as well.

Well, that's a quick overview from my limited knowledge. Hope it helps.

Steve Fox
http://w3.rchland.ibm.com/~sjfox (IBM Intranet)
http://pcxtreme.org (Personal)
http://k-lug.com (Rochester Linux User Group)



John LeMay <jlemay@njmc.com> on 12/02/99 10:09:40 PM

Please respond to LINUX5250@midrange.com

To:   linux5250@midrange.com
cc:
Subject:  OFF TOPIC: OS/400 V4Rx command ref




Anyone know of a good command reference online or hardcopy for OS/400
V4Rx? I'm at a point where I probably know about three or four commands
(dspsyssts, dspusrprf, that's about it off the top of my head!), and I
have no idea how the OS/400 file system works or is structured. Thought
this would be a good starting point!

Thanks!

--
John J. LeMay Jr.
NJMC, LLC.
http://www.njmc.com
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