_____________________________________________________________________ Robert P. McGraw, Jr. Manager, Computer System EMAIL: [EMAIL PROTECTED] Purdue University ROOM: MATH-807 Department of Mathematics PHONE: (765) 494-6055 150 N. University Street FAX: (419) 821-0540 West Lafayette, IN 47907-2067
> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On Behalf Of Jon LaBadie > Sent: Tuesday, August 01, 2006 6:12 PM > To: [email protected] > Subject: Re: tapetype question > > > On Tue, Aug 01, 2006 at 01:53:45PM -0400, McGraw, Robert P. wrote: > > Presently I am using an SDLT220 tape drive with hardward compression > turn > > on. I have a new LTO2 tape drive and I really do not want to run the > > amtapetype program if someone else has already done this. > > > > Here is my LTO2 drive: > > > > Product Type: Tape Drive > > Vendor ID: 'HP ' > > Product ID: 'Ultrium 2-SCSI ' > > Revision: 'F63Z' > > Attached Changer: No > > SerialNumber: 'HUL5M02595' > > MinBlock:1 > > MaxBlock:16777215 > > Ready: yes > > > ... > > > > I am running Solaris 10 on the amanda server. I ran the first part of > > tapetype with /dev/rmt/1n(c) where "n" is no rewind and "c" is > compression. > > I did not specify the "c" or "u" for compression, yet I got "WARNING: > Tape > > drive has hardware compression enabled". > > > ... > > > > > > Any ideas on how to turn off compression? > > > > I'm assuming things haven't changed drastically from Sol9. > > Do you also have some other "1n" devices in /dev/rmt? > For example, do you have 1ln (low), 1mn (medium), 1hn (high)? > One of these `may' be the drive with compression turned off. [McGraw, Robert P.] I got a bunch. Various permuntation of 'lmhcubn". My st man page does not give a lot of info for the LTO drive. > > BTW devices "c" (compressed) and "u" (ultra) are always the > same. And the names for the letters don't really mean anything > except convention. "l" could be high density compressed > while "u" could be low density uncompressed. Not often set up > that way, but who knows. They could also all be the same. The > device without letters 1n or just 1, matches one of the lettered > devices as the "default". But which one is controlable. [McGraw, Robert P.] The st man page does explain the letters but not sure that the work for the LTO. > > These devices are controlled by driver settings specified > in /kernel/drv/st.conf. During boot an id string is read from > the device. It can be found in the massive output of prtconf, > the '-D' option I think. That id string gets matched with one > in st.conf. My Sol9 st.conf doesn't have an LTO entry so I > can't demo it exactly. Sometimes you have to read the drive > manufacturers docs to find their recommendation for the lines. > But here is a line used by my old HP DDS3 6x24 changer. [McGraw, Robert P.] Per Solaris 10 /kernel/drv/st.conf # # The officially supported devices do not require a entry under # tape-config-list as their configuration is built in to the driver. # My drive is officially supported and so no entry. This is a good time to ask sun support. That is why I am paying for the service. Thanks Robert > > "HP C1557A", "HP DDS-3 4mm DAT loader", "HPdds3"; > > The first string is what is matched, spaces are important. > The last string (HPdds3) is used to get another config entry > later in the file. Different manufacturers may output different > strings but use the same config entry. My config entry is: > > HPdds3 = 1, 0x34, 0, 0x0D639, 4, 0x00, 0x13, 0x24, 0x03, 0; > > I once figured out what each of the first couple of fields were, > with various docs you can break 0xD639 to the bits turned on and > off and their meaning to the device driver. But the last 6 fields > are what we care about. > > 4 how many devices with letters will be created (4 max) > 0x00 some code to the device and driver for the "l" device > 0x13 ditto "m" device > 0x24 ditto "h" device > 0x03 ditto c" and "u" devices > 0 which of the 4 devices matchs the default (no letter) device. > In this case it is the "l" which is the default. I modified > it from HP's recommended "3" (the c/u device) because I wanted > it to be no compression. > > > On the net I found a suggested entry for LTO2 - I have no idea > if it is correct or reasonable. > > ULTRIUM = 1, 0x36, 0, 0xd639, 4, 0x00, 0x00, 0x00, 0x40, 3; > > This one creates all the 4 of the lettered devices, but note that > l, m, and h are all the same (0x00). With this entry, the default, > unlettered device is 3, matching the "c" and "u" devices. > > I'm guessing the 0x00 devices are compression off, but don't > know that for certain. > > At least you have a starting point to investigate. > > -- > Jon H. LaBadie [EMAIL PROTECTED] > JG Computing > 4455 Province Line Road (609) 252-0159 > Princeton, NJ 08540-4322 (609) 683-7220 (fax)
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