Jean-Pierre Radley wrote:
> Robert Lipe propounded:
> | In <34356036.4...@yy.laketaylor.org> "Mark A. Davis" <m...@yy.laketaylor.org> writes:
> | >I need something which is reliable, and will deal properly with all of
> | >SCO Openserver's symbolic links. (I prefer not to use prepackaged
> | >backup software.) Thanks for any assistance!
> | In all, this is not the place to skimp for $200 or whatever that type
> | of tool is selling for these days...
> IOW: bitwise, bytefoolish.
Oh, I could not agree further! But it is not a cost issue here. I
prefer using stock tools and shell scripts, especially when it is not a
problem, I already have the tools, and when it might be necessary anyway
to take advantage of special robot drive features.
I have received lots of messages from people saying I should use a
pre-canned backup program. I will use LoneTar as an example. I have
nothing against Lone-Tar or Cactus software, if fact I have a great deal
of respect for them and would recommend their products to sites who can
benefit from their products. I just want to illustrate that perhaps it
is not needed here, and/or not what I had in mind for a backup. I took
their list of features:
1. Available on most flavors of UNIX.
cpio everywhere. With cpio -c, I'm sure compatability is good
2. Easy to use MENU interface. All LONE-TAR Features are accessible
through the Menu System.
not needed here
3. Includes interface source code for easy modifications and enduser
sh scripting- ultimate in flexibility
4. BIT-LEVEL Verification of archived data.
Don't need. Tape drive verification, see below
5. On-the-fly data compression, guarantees to at least double the
capacity of your backup device.
Tape drive does that
6. DOUBLE-BUFFERING for increased speed.
NA- done at night, plenty of time. Close to full tape speed with cpio
7. Wild card support during Backups and Restores.
find * cpio -i *
8. Backs up everything including device files, empty directories,
symbolic links, Virtual Files and NFS mounted file systems.
9. Backs up RAW Partitions (i.e. Informix, Oracle and Progress
just to name a few).
10. Includes TAPE-TELL, which prevents the accidental overwriting of
most current backup.
Not needed here
11. Includes CRONY, a complete interface to manage all your "cron"
especially LONE-TAR unattended backups.
Not needed here
12. Ability to Log-off users before starting the backup, and keep them
until the backup is complete.
quiet system at night
13. Capable of automatically ejecting 4mmDAT and 8mm tapes upon
completion of backup and verification.
14. Full on-line documentation
15. Command line operation using familiar "tar" options and modifiers
16. Outstanding Technical support services, with 24 hour/7 day a week
Technical Support during a system crash, for AIR-BAG users.
Not needed here
17. FLAT FILE restore allows restoring files exactly where you want
18. Pre-configured Inclusion and Exclusion lists.
19. Non-Destructive restore with interactive option.
20. Password security.
21. Hardware independent.
22. Complete log files of Backups, Restores and Verifications.
23. Error recovery from bad media, tape or hard drive.
not sure about that one
24. Allows Incremental backups to run unattended, and in most cases,
only one tape.
I have more than enough space
25. DOES NOT use "tar" but is completely "tar" compatible, to provide
easy learning curve from standard Unix systems.
26. Easy file recovery from any "tar" format tapes.
what about special files and such? not an issue with cpio, right?
27. Backup status reports and automatic logging.
28. Override file locking, for backups while the system is running.
Is that a problem with find & cpio??
29. Notification of file size changes during backup or verify.
there are no changing files at night I am worried about
30. Master and Incremental Strategy as well as Selective backup, both
from a Menu or command line usage.
We will always back up the whole system- never incremental
31. Support for larger blocking factors than "tar" for increased speed.
32. Easy view of backup history from the Menu.
33. Log files created to provide easy view of all archive files
in last operation (i.e. Backup, Restore, Verify).
cpio -i < /dev/rct0 ./!tape_dir ; more !tape_dir ; fgrep whatever
34. Compression to non-seeking devices such as tape.
we will be using only 4mm & 8mm
35. All file information is recorded including: date, time, size,
attributes, permissions, owner, group and version.
36. Error recovery - able to do salvage backup of failing hard drive.
37. Ability to set the depth level of sub-directories to backup.
find -depth -purge -level
38. Non-destructive Restore option, interactive or fully automated.
39. Volume number checking to prevent restoring out of sequence.
Not an issue here
40. Large blocking support for faster restores.
41. Error Recovery - can recover from bad spots on tape or floppy, and
familiar "Directory not in proper format" error.
8mm & 4mm drives
42. Relative restore option, allows an entire section of the archive to
restored as the directory tree under a directory of the user's
43. Flat file restore strips off absolute pathnames to directly restore
files to the directory of your choice.
44. Selective file restore by name or wild card.
cpio -i *name*
45. Update Restore, updates files on hard disk out of date with files
Not needed here
46. Restore files by date of creation/modification, (i.e. all files
after November 5, 1990)
Not needed here- we would go by the tape listings
47. Trim filenames to 14 characters, for transferring to Operating
which don't support extended length filenames.
Not an issue
48. Supports Dos-Tar from Cactus International.
49. DOS Text-mode conversion when restoring files from a DOS Platform.
Don't use MS-DOS
50. THREE LEVELS OF VERIFICATION:
51. Verification of files from the Menu, or command line usage.
52. Verification log reports:
I really don't think I need to verify from tape to HD contents. This is
a 4MM drive, which will read-after-write and the data is coming from a
RAID-5 platform. Granted, I suppose it is possible that the SCSI bus or
drivers could lose something, but it is extremely remote. Anway, if I
really had to, I could verify using cpio, although it would take a
Certainly Lone-Tar is an excellent product for many types of
with our situation and hardware, it doesn't seem to offer anything much
what we already have and what our requirements are.
Now, what it appears it does not do that I need:
1) splitting backups into sections with setmarks between them (file
2) robotic drive control
both of which I can do with stock tools.
And possible negatives for us:
1) Costs money (certainly not much, it is a good value, but not if I
2) Another thing to load, maintain, update.
3) Possibly another step in system restoration, if regular tar will not
work with it to restore empty files, special files, FIFO's, etc
So, now, anyone brave enough to read all my rambling ;) understands why
I would prefer to just use stock tools.
| Mark A. Davis, |Lake Taylor| Voice: (757)-461-5001x431 8-4:30ET |
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