Re: hfs+: unable to access random files (after a while)

[Viacheslav Dubeyko <slava@dubeyko.com>]

On Wed, 2015-05-06 at 19:33 +0200, Luc Pionchon wrote:
> On 6 May 2015 at 18:44, Viacheslav Dubeyko <slava@dubeyko.com> wrote:
> > On Wed, 2015-05-06 at 11:41 +0200, Luc Pionchon wrote:
> >> Hi,
> >>
> >> my system randomly fails to access (random) files on a HFS+ partition.
> >>
> >> Could anybody help me to identify the issue?
> >>
> >>
> >> I have a HFS+ partition shared between Linux and OSX.
> >> I created it with OSX Disk Utility as HFS+, Case sensitive, Not Journaled.
> >>
> >
> > Does this partition live on HDD or SSD?
> 
> It's a SSD
> 

Yes, I suppose that the reason of your issue is SSD drive itself. You
have very different HFS+ error messages. It looks like that you have I/O
errors after trying to generate the read/write requests. I assume that
your syslog contains such error messages too. And I think that it is the
primary reason of the issue.

My last SSD drive worked well one year only. Now I can read from
partitions on device but any write operations fail. So, sometimes a SSD
drive can behave itself in very tricky way.

> 
> > Are you sure that your SSD is alive (if partition lives on SSD)?
> 
> I do not know what means "alive". How can I check?
> 
> The whole system is on this SSD, in a MacBook 2.1:
> / and /home as ext4, linux swap, OSX partition, EFI partition,
> and the faulty partition.
> 

Usually, S.M.A.R.T should provide information about SSD drive's health.
You can use smartmontools (for example, smartctl utility). But, frankly
speaking, I think that it needs to treat a file system behavior in wise
way for understanding a drive healthiness very frequently. If a file
system emits error messages in a really crazy way then the most probable
reason of an issue can be a drive itself. 

> 
> 
> > If you'll move partition on another device the issue will be
> > reproducible?
> 
> How can I move a partition?
> 

You can use different specialized tools. I think you can use Gparted,
dd, rsync or cpio utilities under Linux. I think you can find the
description of using with tools for moving a partition in the Internet.

> Would it help if I create a partition of the same type on a USB drive,
> and see if I get similar errors?
> 
> I just have another SSD, is it ok?
> Or should I try to get a USB HDD?
> 

It is possible to use any valid device. But HDD sounds as more reliable
way for me. But, finally, it's up to you.

Thanks,
Vyacheslav Dubeyko.