I have a couple production machines installed running Mach3/Windows with CF cards as the drives - there are some ways to grab part of the the Windows XP embedded files and use them with Windows XP so you can minimize writebacks to the drives. These computers are going on 3 years running 24x7. I have several PCs running LinuxCNC on production machines - one is running off a CF card and has been going 24x7 for over 2 years now. I used a Seagate 160 gig laptop drive on another LinuxCNC machine two years ago and that drive just failed. I'm convinced that SSDs or CFs are best for industrial machine control if you take measures to minimize the disk writes to the device. In any case Linux seems to be easy on disks compared to Windows (why am I not surprised!)
In an industrial environment - mostly hot, not dusty - conventional drives seem to last right about 2 years in the Midwest USA factories. Not very long. Many PLCs are now running with flash cards - usually SD type cards and I have never seen a failure of one of those cards. Keep the write back under control and they should last for a very long time. Dave On 8/2/2012 12:02 PM, Les Newell wrote: > Hi Jarrett, > > >> I've had bad experiance and good. (I'm sorry Les but I'm going to >> contradict you [absolutely no offense intended]) >> > It is good to hear a differnt point of view ;-) > > >> One thing that I feel makes a big difference when it comes to SSD's >> is the quality of the drives. I only use Kingston or Sandisk drives, I >> can't remember the name of the SSD's used in the centroid system but I >> do recall they were more 'generic' not something I would have looked >> at as a high-line product. I wouldn't say the issue was with the >> operating system however, I do believe the drive quality did have a >> large impact in this instance. >> >> > I ran a total of 3 Kingston SSDs in my main computer (win7) and on > average they started randomly losing data after about 6 months. They > never reported a fault you just suddenly found files disappearing or > being horribly corrupted. I am now running a pair of hybrid drives in a > mirrored RAID array. > > My lathe runs on a 8G CF card and up until a year ago my network > server ran on a CF card as the main boot drive with zero problems. The > server now has a SSD which has been operating fine for about a year > running 24/7. For reliability CF cards are probably slightly better as > they generally use SLC memory rather than MLC. On the down side CF cards > are slow as molasses. > >> I LOVE the super speed of that >> machine, I've got the 7200rpm high Bit drives on other machines and >> it's slow as 80 weight oil on new years day by comparison. >> > SSDs do make a huge difference in speed. That is why I kept trying with > the SSDs. Hybrid drives are a little faster than standard drives but to > be honest I am not sure if they are worth the extra cost. > > Les > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
