|
|  以 PDF 格式下载本书
- CHAPTER 38
Tape Drive Test (tapetest)
- The tapetest synchronous I/O test writes a pattern to a specified number of blocks (or, for a SCSI tape, writes to the end of the tape). The tapetest then rewinds the tape and reads and compares the data just written. The tapetest asynchronous I/O test sends a series of up to 5 asynchrounous read/write requests to the tape drive, writing to the tape and then reading and comparing the data. The tapetest file test writes four files to the tape and then reads them back, comparing the data. For tape library testing, the pass count is incremented only after all tapes in the library have been tested.
-
Note - If you have a tape drive in your system, load a blank writable tape (scratch tape) before you start SunVTS. If you fail to do this, the tapetest option displays drive type:unknown on the option menu for the tapetest.
tapetest Options
-
tapetest supports 4mm, 8mm, DLT, 1/4-inch cartridge, and 1/2-inch front-load tape drive testing. The options available for each of the tape devices differ slightly. An example of the option pop-up menu for a device is shown in FIGURE 38-1.
- The Async I/O subtest uses the asynchronous read and write feature of the Solaris tape driver to exercise tape drives. In read-only mode the test sends a maximum of four asynchronous read packets, each with a random size and a random offset, to the tape drive. The test then waits for all outstanding I/O activity to complete before issuing another round of packets. This process continues until the whole area being tested has been covered. In read-write mode, one write packet is issued for every four read packets to ensure a spot check of the write operation. The area of the tape to be tested is written to first in order for the test to work correctly. This test is only supported under Solaris 2.6 and later releases.
FIGURE 38-1 tapetest
-
Note - This test does not immediately stop after being disabled.
- The example in FIGURE 38-1 shows the options menu for a 4mm tape drive.
-
Note - The option menus for the 1/4-inch, 1/2-inch, DLT, and 8mm tape drives differ slightly from FIGURE 38-1.
-
TABLE 38-1 tapetest
| tapetest Options | Description |
|
| Type | Normal tape drive or tape library (stacker) |
| # of Tapes | The number of tapes in the tape library. tapetest registers a single tape library pass only after all tapes in the library pass. |
| Format | QIC-11 and QIC-24 are quarter-inch tape formats that this test uses when it
writes to the scratch tape you inserted. QIC-11 uses a
1-byte block ID; QIC-24 uses a 4-byte block ID, so each block on a QIC-24
tape is uniquely identifiable. Use a standard scratch tape for this test. QIC-11
format is the default testing format; however, you can choose QIC-24 only, or
both of QIC-11 and QIC-24 formats. If you choose both, the test first writes
one pass to the tape in QIC-11 format, and then writes a second pass over it
in QIC-24 format |
| Density | The following settings are available for 8mm tape drives: -EXB8200: Writes 2.3 Gbytes of data to the tape -EXB8500: Increases the density and writes 5 Gbytes of date to the tape -Both: Writes both 2.3 Gbytes, and 5 Gbytes of data to the tape. For half-inch tape drives the available settings are 800, 1600, and 6250 BPIs |
| Mode | If you enable Write/Read mode, the test first writes to the tape and then reads it back to compare. If you enable Read_Only mode, the test assumes the tape has been properly written and merely reads and compares. This mode is useful to check proper head alignment |
| Length | The amount of the tape to be tested. The choices are:
-EOT: The default; tests to the entire tape.
-Long: The SCSI tape tests 70,000 blocks of the tape.
-Short: Only the first 1000 blocks are tested.
-Specified: You must type the number of blocks to be tested in the # of
blocks field. |
| # of Blocks | If you select Specified under the Length option, you must type the number of blocks you want to test. |
-
TABLE 38-1 tapetest
| tapetest Options | Description |
|
| File Test | The tape file test sequence is as follows:
-Writes three files
-Rewinds
-Reads part of the first file
-Forward spaces to the start of the second file
-Reads the second file
-Forward spaces to the start of the third file
-Tries to read to the end of that file for SCSI tapes only, the tape file test tries
to backspace to the start of the second file and read it |
| Retension | When enable is selected, the program retensions the tape. |
| Media Test Method | SyncI/O: tapetest reads and or writes the number of blocks selected in Length. AsyncI/O: tapetest makes four asynchronous read requests to the tape drive. If read and write testing is selected, one asynchronous write request is also sent. The test continues after completing the requests.
|
tapetest Test Modes
- The tapetest supports all three modes. It performs different test schemes on the network device, according to the mode you select.
-
TABLE 38-2 tapetest
| Test Mode | Description |
|
| Connection Test | In this mode, tapetest verifies that the drive can be opened and that the drive type can be determined. If both checks are successful, or if the drive is currently busy, then the test passes. The tapetest fails if the open operation is unsuccessful for any reason other than the drive is busy. |
| Functional Test | In this mode, tapetest checks the status, rewinds the tape, erases and retensions it. If the device is a cartridge tape, tapetest writes a pattern to nblks or eot (default), rewinds the tape, and then does a read and compare of the pattern If you invoke SunVTS through SyMON, the following Functional Test description applies: tapetest opens the device and reads several blocks from it. If the read operation is successful, the test has passed. On the other hand, if the device is busy or if no tape cartridge can be found in the drive, the test cannot be run and fails
|
tapetest Command Line Syntax
-
-
/opt/SUNWvts/bin/tapetest standard_arguments -o dev=device_name,
s=block_count,d=density,m=mode,l=length,method=method,ft=enables/
disables,ret=enables/disables, dat=dat_type,8mm=8mm_type num=magazine_size
-
TABLE 38-3 tapetest
| Argument | Explanation |
|
| dev=device_name | Specifies the device_name of the tape drive (required) |
| s=block_count | Specifies the number of blocks to be tested |
| d=density | Specifies the density of the tape to open |
| m=mode | Enables either the Write_Read or Read_Only tests |
| l=length | Specifies the length of the test (EOT, Specified, Long, or Short) |
| method=method | Specifies the media test method (SyncI/O and or AsyncI/O) used. |
| ft=enables/disables | Enables or disables the file test |
| ret=enables/disables | Enable or disables tape retention |
| dat=dat_type | If you are testing a digital audio tape drive, specify if it's a regular DAT drive or a DAT stacker. The choices are DAT and DAT_Stacker. |
| 8mm=8mm_type | If you are testing an 8mm tape drive, specify if it's a regular 8mm
tape drive or a tape library. The command line choices are 8mm
and 8mm_Library. |
| num=magazine_size | If you are testing a tape library, specify the magazine size. |
tapetest Error Messages
-
TABLE 38-4 tapetest
| Error Message | Probable Cause(s) | Recommended Action |
|
| 6000 | Missing device name | No device name specified | Retry test with correct device name specification |
| 6001 | failed ioctl on unload and load next tape: err_code = <number>! | This stacker/library unit may lack the Automatic Cycle option | Run the test with Single Pass Option enabled |
| 6002 | Cannot open
<device_name>:
<error_message> | No tape media in drive | Load tape media and retry test |
| 6005 | Cannot close
<device_name>:
<error_message> | Bad drive | Retry test; if problem persists,
check or replace the drive |
| 6006 | <text> write failed on <device_name>, block <number>: EOF reached | EOF reached prematurely | Retry test with reduced blocksize specification or until EOF. |
| 6007 | <text> write failed on <device_name>, block <number>:
<error_message>, sense key(0x<value>) = <text>
| Drive needs attention | Perform action to reset sense key and retry the test |
| 6008 | <text> read failed on <device_name>, block <number>: EOF reached | EOF reached prematurely | Retry test with reduced blocksize specification or until EOF |
| 6009 | <text> read failed on <device_name>, block <number>:
<error_message>, sense key(0x<value>) = <text>
| Drive needs attention | Perform action to reset sense key and retry test |
| 6010 | <text> compare failed on <device_name>, block <number>, offset <number>, pattern 0x<value>, data= 0x<value> | Bad drive | Retry test; if problem persists, check or replace the drive |
| 6011 | <device_name> tape MTIOCGETDRIVETYPE ioctl: <error_message> | Bad drive | Retry test; if problem persists, check or replace the drive |
-
TABLE 38-4 tapetest(Continued)
| Error Message | Probable Cause(s) | Recommended Action |
|
| 6012 | <text> failed on <device_name>: <error_message> | Bad drive | Retry test; if problem persists, check or replace the drive |
| 6013 | Failed Connection test | Broken cable. | Check or replace the cable |
| on
<device_name>:<error_mes sage>
| Bad drive | Check or replace the drive |
| 6014 | Failed Online test:<device_name> | Device may be in use | Retry later |
| 6015 | Failed Online test:<device_name>:<erro r_message> | No tape media in drive | Load tape media and retry test |
| 6016 | Online test was unsuccessful:<device_nam e> | No tape media in drive | Load tape media and retry test |
| 6017 | Failed Online read test:<device_name> | Bad drive | Retry test; if problem persists, check or replace the drive |
| 6018 | Open Failed on | Broken cable | Check or replace the cable |
| <device_name>:
<error_message> | Bad drive | Check or replace the drive |
| 6018 | recon : No Corresponding SCSI disk device |
|
|
| 6019 | Needs both SCSI disk and SCSI tape to run the test |
|
|
| 6020 | Couldn't retension '<device_name>' |
|
|
| 6021 | Couldn't read file '<device_name>' |
|
|
| 6022 | SCSI disconnect/
reconnect failed |
|
|
| 6023 | Spurious signal received from child |
|
|
|
|
