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Re: OT: Avoiding harddisk failure due to mobility



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
> 
> 
> 
> 
> 
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