70 messages in org.freebsd.freebsd-scsiSCSI tape data loss| From | Sent On | Attachments |
|---|---|---|
| Kern Sibbald | Jun 1, 2003 10:54 am | |
| Dan Langille | Jun 1, 2003 11:32 am | |
| Justin T. Gibbs | Jun 1, 2003 1:08 pm | |
| Kern Sibbald | Jun 1, 2003 2:44 pm | |
| Justin T. Gibbs | Jun 1, 2003 3:39 pm | |
| Matthew Jacob | Jun 1, 2003 5:00 pm | |
| Matthew Jacob | Jun 1, 2003 5:13 pm | |
| Dan Langille | Jun 1, 2003 6:58 pm | |
| Matthew Jacob | Jun 1, 2003 7:03 pm | |
| Kern Sibbald | Jun 2, 2003 1:28 am | |
| Kern Sibbald | Jun 2, 2003 1:29 am | |
| Kern Sibbald | Jun 2, 2003 1:57 am | |
| Kern Sibbald | Jun 2, 2003 3:45 am | |
| Dan Langille | Jun 2, 2003 4:28 am | |
| Matthew Jacob | Jun 2, 2003 8:05 am | |
| Justin T. Gibbs | Jun 2, 2003 8:10 am | |
| Dan Langille | Jun 2, 2003 8:14 am | |
| Matthew Jacob | Jun 2, 2003 8:21 am | |
| Kern Sibbald | Jun 2, 2003 8:27 am | |
| Dan Langille | Jun 2, 2003 9:46 am | |
| Dan Langille | Jun 2, 2003 11:05 am | |
| Matthew Jacob | Jun 2, 2003 11:11 am | |
| Justin T. Gibbs | Jun 2, 2003 11:49 am | |
| Dan Langille | Jun 2, 2003 12:06 pm | |
| Justin T. Gibbs | Jun 2, 2003 12:10 pm | |
| Matthew Jacob | Jun 2, 2003 1:14 pm | |
| Dan Langille | Jun 2, 2003 2:16 pm | |
| Matthew Jacob | Jun 2, 2003 2:24 pm | |
| Kern Sibbald | Jun 2, 2003 2:46 pm | |
| Matthew Jacob | Jun 2, 2003 2:55 pm | |
| Kern Sibbald | Jun 2, 2003 3:31 pm | |
| Carl Reisinger | Jun 2, 2003 3:44 pm | |
| Matthew Jacob | Jun 2, 2003 3:44 pm | |
| Dan Langille | Jun 2, 2003 6:37 pm | |
| Kern Sibbald | Jun 3, 2003 12:28 am | |
| Kern Sibbald | Jun 3, 2003 6:07 am | |
| Carl Reisinger | Jun 3, 2003 6:19 am | |
| Kern Sibbald | Jun 3, 2003 6:37 am | |
| Carl Reisinger | Jun 3, 2003 7:01 am | |
| Matthew Jacob | Jun 3, 2003 7:34 am | |
| Justin T. Gibbs | Jun 3, 2003 7:51 am | |
| Kern Sibbald | Jun 3, 2003 8:05 am | |
| Kern Sibbald | Jun 3, 2003 8:11 am | |
| Matthew Jacob | Jun 3, 2003 9:03 am | |
| Dan Langille | Jun 3, 2003 9:10 am | |
| Justin T. Gibbs | Jun 3, 2003 9:24 am | |
| Kern Sibbald | Jun 3, 2003 9:40 am | |
| Justin T. Gibbs | Jun 3, 2003 10:03 am | |
| Kern Sibbald | Jun 3, 2003 10:19 am | |
| Kern Sibbald | Jun 3, 2003 10:34 am | |
| Matthew Jacob | Jun 3, 2003 11:00 am | |
| Matthew Jacob | Jun 3, 2003 11:16 am | |
| Matthew Jacob | Jun 3, 2003 11:39 am | |
| Justin T. Gibbs | Jun 3, 2003 12:12 pm | |
| Dan Langille | Jun 3, 2003 12:43 pm | |
| Matthew Jacob | Jun 3, 2003 12:46 pm | |
| Kern Sibbald | Jun 3, 2003 1:05 pm | |
| PostMaster General | Jun 3, 2003 2:21 pm | |
| Kern Sibbald | Jun 4, 2003 12:20 am | |
| Matthew Jacob | Jun 4, 2003 7:51 am | |
| Kern Sibbald | Jun 4, 2003 9:51 am | |
| Kern Sibbald | Jun 6, 2003 7:38 am | |
| Dan Langille | Jun 6, 2003 8:59 am | |
| Matthew Jacob | Jun 6, 2003 11:50 am | |
| Dan Langille | Jun 20, 2003 6:17 pm | |
| Dan Langille | Jul 1, 2003 5:07 pm | |
| Matthew Jacob | Jul 1, 2003 11:11 pm | |
| Michael L. Squires | Aug 25, 2003 4:16 am | |
| Dan Langille | Aug 25, 2003 9:13 am | |
| Michael L. Squires | Aug 27, 2003 5:27 am |
| Subject: | SCSI tape data loss | |
|---|---|---|
| From: | Kern Sibbald (ke...@sibbald.com) | |
| Date: | Jun 2, 2003 1:29:40 am | |
| List: | org.freebsd.freebsd-scsi | |
Yes, after a bit more thought, I realized this was the case, thanks.
In any case, both buffered and async writes are turned off by default.
On Mon, 2003-06-02 at 02:00, Matthew Jacob wrote:
Of course linux has async && buffered. Linux has to copy the data from user space to kernel buffers and *then* write them. This leads to an obvious desire to overlap such writes. The same feature was available in Solaris 2.5 as well.
'Buffering' as we talk about here typically means the device buffers themselves. You don't want to turn this off. You don't want to turn this off. You don't want to turn this off. The only device that I know of that really *has* to have this off is the old M4 1/2" reel drive because it would discard buffered data when it saw the early warning marker.
I have a longer answer to the previous mail about to go out.
-matt