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Elad Lahav
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Re: QNX 6.6.0 on Intel based CPU with SDD drive and Power-Safe filesystem
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Elad Lahav
09/14/2018 4:42 PM
post119104
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Re: QNX 6.6.0 on Intel based CPU with SDD drive and Power-Safe filesystem
That doesn't matter. The question is whether you have a /tmp directory
before you mount the file system on the SDD drive.
On Fri, 2018-09-14 at 19:05 +0000, Janusz Ruszel wrote:
> Hi Elad,
> You made a great point but in my case the /tmp directory is
> mounted to the separate physical SDD drive /dev/hd1t179 remaining
> directories are mounted from /dev/hd0t179 which also is a SDD drive.
>
>
> Thanks,
> Janusz
>
>
> -----Original Message-----
> From: Elad Lahav <community-noreply@qnx.com>
> Sent: Friday, September 14, 2018 1:58 PM
> To: ostech-core_os@community.qnx.com
> Subject: Re: QNX 6.6.0 on Intel based CPU with SDD drive and Power-
> Safe filesystem
>
> Welcome to the wonderful world of union file systems!
> You probably have a /tmp (typically a link to /dev/shmem) before
> mounting the file system, which then puts its own /tmp directory on
> top of the previous one. That previous directory is still there, and
> any open file descriptors still point to files under it. When you
> deleted the /tmp directory from the file system you re-exposed the
> /tmp directory under it.
>
> --Elad
>
> On Fri, 2018-09-14 at 15:08 -0400, Janusz Ruszel wrote:
> >
> > I have a SDD drive formatted with partition 179 and mounted as a
> > /tmp
> > directory.
> > The slogger -c -s 200k -l /tmp/syslog,4096k is running fine most
> > of
> > the time and creates /tmp/syslog1 and /tmp/syslog2 files.
> >
> > One a while i can notice that the content (size and time stamp)
> > are
> > are changing.
> >
> > So i went to the /tmp/directory and deleted syslog2 file (rm
> > syslog2) and just to verify that the file is deleted run ls command
> > TO
> > MY BIG surprise the file still exist , it had different time stamp
> > and
> > the size was nearly 4MB. The content of that file (sloginfo
> > /tmp/syslog2) made a sense .
> >
> > Why the "rm" command created such a condition on the file system.
> > Should i worry about the whole file system integrity? Any comments
> > or
> > explanation would be greatly appreciate specially from QNX .
> >
> > Regards,
> > Janusz
> >
> >
> >
> >
> >
> > _______________________________________________
> >
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> _______________________________________________
>
> OSTech
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