| From | Sent On | Attachments |
|---|---|---|
| Rick Hamell | Sep 19, 2000 5:35 am | |
| Rick Hamell | Sep 19, 2000 8:42 am | |
| Alfred Perlstein | Sep 20, 2000 12:51 pm | |
| Edward Elhauge | Sep 20, 2000 12:58 pm | |
| Wilko Bulte | Sep 20, 2000 12:59 pm | |
| Marc Tardif | Sep 20, 2000 1:08 pm | |
| Wilko Bulte | Sep 20, 2000 1:18 pm | |
| David Scheidt | Sep 20, 2000 1:20 pm | |
| Alfred Perlstein | Sep 20, 2000 1:23 pm | |
| Edward Elhauge | Sep 20, 2000 1:24 pm | |
| Fred Clift | Sep 20, 2000 1:34 pm | |
| Bernd Walter | Sep 20, 2000 1:43 pm | |
| Alfred Perlstein | Sep 20, 2000 1:47 pm | |
| Nick Rogness | Sep 20, 2000 1:48 pm | |
| Matthew Jacob | Sep 20, 2000 1:55 pm | |
| Bernd Walter | Sep 20, 2000 2:26 pm | |
| Aleksandr A.Babaylov | Sep 20, 2000 2:55 pm | |
| Warner Losh | Sep 20, 2000 3:01 pm | |
| Warner Losh | Sep 20, 2000 3:02 pm | |
| David Scheidt | Sep 20, 2000 3:28 pm | |
| Aleksandr A.Babaylov | Sep 20, 2000 3:50 pm | |
| Sergey Babkin | Sep 20, 2000 5:47 pm | |
| Mike | Sep 20, 2000 6:09 pm | |
| David Scheidt | Sep 20, 2000 6:50 pm | |
| Aleksandr A.Babaylov | Sep 20, 2000 8:58 pm | |
| Keith Kemp | Sep 21, 2000 3:28 pm | |
| Douglas Swarin | Sep 21, 2000 4:23 pm | |
| Warner Losh | Sep 21, 2000 4:44 pm | |
| Sergey Babkin | Sep 21, 2000 5:08 pm | |
| Joe Greco | Sep 21, 2000 7:32 pm | |
| Joe Greco | Sep 21, 2000 7:37 pm | |
| Douglas Swarin | Sep 21, 2000 10:26 pm | |
| jdb-...@layer8.net | Sep 21, 2000 11:55 pm | |
| Adrian Chadd | Sep 22, 2000 7:23 am | |
| Wes Peters | Sep 22, 2000 10:41 pm | |
| Warner Losh | Sep 23, 2000 8:21 am | |
| Andreas Klemm | Oct 3, 2000 11:18 am |
| Subject: | Re: Frustration with SCSI system | |
|---|---|---|
| From: | Warner Losh (im...@village.org) | |
| Date: | Sep 21, 2000 4:44:10 pm | |
| List: | org.freebsd.freebsd-hackers | |
In message <2000...@staff.texas.net> Douglas Swarin writes: : Ideally, I would use one of the IDE flash-based drives on the market. One : brand is SanDisk, and they take a standard IDE connector and fit into a : 3.5" drive bay. You can get them very reasonably priced up to 128MB or : so, which is just fine for a boot partition. Since flash drives have no : moving parts, mechanical failure is not an issue, and since the root : partition is not written to much, the flash will not wear out for a : long time (flash cells wear out after about 100,000 writes; the flash : drives do load balancing and stuff to ensure that the (many) cells in : the drive are written to evenly).
We use these devices heavily at Timing Solutions. Or rather we use a IDE <-> CF adapter and haven't had any devices wear out. And some of these devices have had rather heavy use. I think that it is closer to 1 million writes per cell, but I don't have my spec sheets handy.
Are you sure that they do write balancing? The indications I have from the base chip technology is that they don't. I could have missed that in the data sheets. It has been a little while since I looked at them, so I might be misremembering. I can't seem to find the data sheets I looked at before.
In any event, this works well. I usually have / be read only. This can be practacle if you don't have any users that desire to change their passwords... Since I have serveral machines that have an extremely limited number of users on, this works well. One can also mount / rw if you need to do maintenance on it for whatever reason.
Warner
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