[mythtv-users] Recordings Directory Corrupted.

Garry garry at sneakyninja.net
Wed Mar 10 18:13:14 EST 2004


Buechler, Mark R wrote:

>On the discussion of filesystems what is everyone's experience with
>filesystems? I've not looked at the source yet for myth but I assume when a
>channel change is made the current ringbuffer is delete and a new one
>created before the channel is changed. I know on my system with not the
>fastest SCSI drives it takes about 2-3 seconds to delete the old and create
>a new ringbuffer before it kicks off the channel change script. The
>filesystem which works best should be very fast on deletions I suppose. Has
>anyone any input on this?
>
>-----Original Message-----
>From: Bruce Smith [mailto:brucesmith at chartermi.net]
>Sent: Thursday, March 11, 2004 9:08 AM
>To: Discussion about mythtv
>Subject: Re: [mythtv-users] Recordings Directory Corrupted.
>
>
>  
>
>>After posting the other day, saying my uptime was weeks... well, famous 
>>last words and all that....
>>
>>MythTV froze when exiting Live TV. It stuck on a freeze frame of the 
>>show I was watching. My usual method of hitting CTRL-ALT-BACKSPACE 
>>didn't have any effect, so I was forced to hit the power button.
>>    
>>
>
>Try logging into the box over your LAN and running "kill"?
>
>  
>
>>Long and short of it, when it came back up, the directory in which all 
>>my recorded shows, along with the ringbuffer had gone. Simply not there 
>>anymore.
>>
>>I've fsch'd it, and it's put a load of big files into a 'lost+found' 
>>directory at the same level as the old recording directory. They look to 
>>be the right length and with the right dates to be my old recordings...
>>    
>>
>
>I've heard of problems with the hardware buffer in some IDE drives that
>doesn't get written right away, even though the journalized filesystem
>thinks the buffer has been committed to the disk.  (not good!)
>
>I always wait a few minutes before pressing RESET/POWER, in the hopes
>everything really gets committed.
>
>  
>
>>I'm not holding out much hope of getting those back (but it's not a 
>>massive deal).. I was more concerned about the loss of a whole 
>>directory. (It's a JFS filesystem BTW)
>>    
>>
>
>I've never used JFS, but I've had really good luck with XFS, very stable
>and FAST.  (FWIW)
>
>  
>
>>Has anyone else had this happen? Or is it my own fault for saying my 
>>uptime was good, and even my wife was using Myth on a regular basis :-)
>>    
>>
>
>That sounds like a good excuse.  :-)
>
> - BS
>
>
>
>
>
>
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>  
>
JFS is very quick on deletions... removed an entire 40Gb directory in 
the blink of an eye :-)

-Garry



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