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Re: OT: Avoiding harddisk failure due to mobility



Good point. But the problem is the robot is not within the wireless
range all the time.

On Mon, 2003-04-28 at 14:41, Michael Harris wrote:
> 
> Sounds pretty cool. No idea what your hardware is like but for about $50
> you could setup wireless ethernet with NFS boot and run diskless. Just looking
> at Compusa's site now they have a wireless access point for $30 and a PCI adapter
> for $22 (part nums 50203595 and 295105).
> 
> 
> > Hi All,
> > 
> > I need some advice on finding a solution to this problem . I have a hard
> > disk mounted on a mobile robot. I am using ext3 fs. The hard disk is
> > subjected to several bumps as the robot travels. I am experiencing
> > frequent hard disk failure ( about once a month). I have thought about 
> > 2 different solutions to this problem. I would appreciate any tips on
> > evaluating them
> > 
> > 1) Use Compact Flash cards: This is a an easy solution. However, I need
> > about 1GB of space. 1GB CF cards cost about $300. There is the issue of
> > CF wear. The cost is the major con of this approach.
> > 
> > 2) Using Ram disk. 
> > 
> > * Create 1 or 2 ram disks on boot.
> > * Mount the stuff that gets written ( /var/log, /tmp, some /etc related
> > to ssh) on the ram disk. )
> > * Put the hard drive to sleep, while the robot is in motion.
> > * Sync the logs from the ram disk to the hard drive, when the robot is
> > stationary.
> > 
> > Approach 2 assumes that, if the hard drive is sleeping while in motion,
> > it will not be damaged. Is this true ??
> > 
> > Does approach 2 sound reasonable? Any other tips/suggestions/criticism  
> > 
> > Thanks!
> > Rahul
> > 
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Ext3-users mailing list
> > Ext3-users redhat com
> > https://listman.redhat.com/mailman/listinfo/ext3-users
> 






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