copywithbadblocks.log

Linux磁盘测试的源代码,测试磁盘的读写性能

	Use 'disklabel' to obtain the partition information:
	  (for our test example, we're using partition 'b')

nkinfuts% disklabel rz0
# /dev/rrz0a:
type: SCSI
disk: rz28
label: 
flags:
bytes/sector: 512
sectors/track: 99
tracks/cylinder: 16
sectors/cylinder: 1584
cylinders: 2595
sectors/unit: 4110480
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0           # milliseconds
track-to-track seek: 0  # milliseconds
drivedata: 0 

8 partitions:
#        size   offset    fstype   [fsize bsize   cpg]
  a:   131072        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 82*)
  b:   401408   131072    unused     1024  8192         # (Cyl.   82*- 336*)
  c:  4110480        0    4.2BSD     1024  8192    16   # (Cyl.    0 - 2594)
  d:  1191936   532480    unused     1024  8192         # (Cyl.  336*- 1088*)
  e:  1191936  1724416    unused     1024  8192         # (Cyl. 1088*- 1841*)
  f:  1194128  2916352    unused     1024  8192         # (Cyl. 1841*- 2594*)
  g:  1787904   532480    4.2BSD     1024  8192    16   # (Cyl.  336*- 1464*)
  h:  1790096  2320384    unused     1024  8192         # (Cyl. 1464*- 2594*)
nkinfuts% 

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	Use 'scu' to create a hard error for testing purposes:

scu> mbad lba 131500 hard
Making HARD Error @ Logical Block 131500 on device /dev/rrz0b (RZ28)...
scu> read media lba 131500 compare off
Reading 1 block (131500 - 131500) on /dev/rrz0b (RZ28)...
scu: Read error at logical block number 131500 (0x201ac).
scu: 'direct read' failed on device 'RZ28' at nexus [0/0/0]
scu: Sense Key = 0x3 = MEDIUM ERROR - Nonrecoverable medium error,
     Sense Code/Qualifier = (0x11, 0) = Unrecovered read error
scu: Error number 1 occurred on Fri Mar  7 08:51:15 1997
scu> 
scu> show sense

Request Sense Information:

                  Device Name/Type: RZ28 (Direct Access)
                 Nexus Information: Bus 0, Target 0, Lun 0
                  Erroring Command: direct read
                        Error Code: 0x70 (Current Error)
                         Valid Bit: 0x1 (Information field is valid)
                    Segment Number: 0
                         Sense Key: 0x3 (MEDIUM ERROR - Nonrecoverable medium error)
                    Illegal Length: 0
                      End Of Media: 0
                         File Mark: 0
                 Information Field: 0x201ac (131500)
           Additional Sense Length: 0xa
      Command Specific Information: 0
   Additional Sense Code/Qualifier: (0x11, 0) = Unrecovered read error
       Field Replaceable Unit Code: 0x3
              Sense Specific Bytes: 00 00 00 

scu> 

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	Show size of partition to be copied 'b', which is 196MBytes:

scu> eval 401408b
Expression Values:

            Decimal: 205520896
        Hexadecimal: 0xc400000
    512 byte Blocks: 401408.000000
          Kilobytes: 200704.000000
          Megabytes: 196.000000
          Gigabytes: 0.191406
scu> 

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	Copy the partition with the bad block to another disk:
	( NOTE: For Digital UNIX, use default 512 byte block size. )

% dt if=/dev/rrz0b of=/dev/rrz3b iomode=copy errors=10 limit=5m
dt: 'read' - I/O error
dt: Relative block number where the error occcured is 428
dt: Error number 1 occurred on Fri Mar  7 10:53:15 1997
Copy Statistics:
    Data operation performed: Copied '/dev/rrz0b' to '/dev/rrz3b'.
     Total records processed: 20478 @ 512 bytes/record (0.500 Kbytes)
     Total bytes transferred: 10484736 (10239.000 Kbytes, 9.999 Mbytes)
      Average transfer rates: 87677 bytes/sec, 85.622 Kbytes/sec
      Total passes completed: 0/1
       Total errors detected: 1/10
          Total elapsed time: 01m59.58s
           Total system time: 00m06.26s
             Total user time: 00m00.35s

dt: 'read' - I/O error
dt: Relative block number where the error occcured is 428
dt: Error number 1 occurred on Fri Mar  7 10:55:11 1997
Verify Statistics:
    Data operation performed: Verified '/dev/rrz0b' with '/dev/rrz3b'.
     Total records processed: 20478 @ 512 bytes/record (0.500 Kbytes)
     Total bytes transferred: 10484736 (10239.000 Kbytes, 9.999 Mbytes)
      Average transfer rates: 359477 bytes/sec, 351.051 Kbytes/sec
      Total passes completed: 1/1
       Total errors detected: 1/10
          Total elapsed time: 00m29.16s
           Total system time: 00m06.68s
             Total user time: 00m01.76s

Total Statistics:
      Input device/file name: /dev/rrz0b (Device: RZ28, type=disk)
     Total records processed: 40956 @ 512 bytes/record (0.500 Kbytes)
     Total bytes transferred: 20969472 (20478.000 Kbytes, 19.998 Mbytes)
      Average transfer rates: 140940 bytes/sec, 137.636 Kbytes/sec
      Total passes completed: 1/1
       Total errors detected: 2/10
          Total elapsed time: 02m28.78s
           Total system time: 00m12.96s
             Total user time: 00m02.13s
               Starting time: Fri Mar  7 10:53:06 1997
                 Ending time: Fri Mar  7 10:55:35 1997

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	Verify the relative block number equals the logical bad block:

scu> eval 131072+428
Expression Values:

            Decimal: 131500
        Hexadecimal: 0x201ac
    512 byte Blocks: 256.835937
          Kilobytes: 128.417969
          Megabytes: 0.125408
          Gigabytes: 0.000122
scu> 


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	Here's what to expect of verify data compare errors:
	   ( expect this if copying mounted file systems )

% scu -f /dev/rrz3b write media lba 131072+500
Writing 1 block (131572 - 131572) on /dev/rrz3b (RZ28B) with pattern 0x39c39c39...
% dt if=/dev/rrz0b of=/dev/rrz3b iomode=verify errors=10 limit=5m
dt: 'read' - I/O error
dt: Relative block number where the error occcured is 428
dt: Error number 1 occurred on Fri Mar  7 11:01:49 1997
dt: Error number 2 occurred on Fri Mar  7 11:01:49 1997
dt: Data compare error at byte 0 in record number 1000
dt: Relative block number where the error occcured is 500
dt: Data expected = 0x39, data found = 0, byte count = 512
dt: The incorrect data starts at address 0x140016000 (marked by asterisk '*')
dt: Dumping Pattern Buffer (base = 0x140016000, offset = 0, limit = 64 bytes):

0x140016000 *39 9c c3 39 39 9c c3 39 39 9c c3 39 39 9c c3 39
0x140016010  39 9c c3 39 39 9c c3 39 39 9c c3 39 39 9c c3 39
0x140016020  39 9c c3 39 39 9c c3 39 39 9c c3 39 39 9c c3 39
0x140016030  39 9c c3 39 39 9c c3 39 39 9c c3 39 39 9c c3 39

dt: The incorrect data starts at address 0x140012000 (marked by asterisk '*')
dt: Dumping Data Buffer (base = 0x140012000, offset = 0, limit = 64 bytes):

0x140012000 *00 00 00 00 00 00 00 00 02 00 00 00 01 00 00 00
0x140012010  c0 19 51 00 00 fc ff ff 00 00 00 00 00 00 00 00
0x140012020  02 00 00 00 01 00 00 00 50 30 4b 00 00 fc ff ff
0x140012030  00 00 00 00 00 00 00 00 02 00 00 00 01 00 00 00

Total Statistics:
      Input device/file name: /dev/rrz0b (Device: RZ28, type=disk)
    Data operation performed: Verified '/dev/rrz0b' with '/dev/rrz3b'.
     Total records processed: 20478 @ 512 bytes/record (0.500 Kbytes)
     Total bytes transferred: 10484736 (10239.000 Kbytes, 9.999 Mbytes)
      Average transfer rates: 361543 bytes/sec, 353.069 Kbytes/sec
      Total passes completed: 1/1
       Total errors detected: 2/10
          Total elapsed time: 00m29.00s
           Total system time: 00m06.88s
             Total user time: 00m01.66s
               Starting time: Fri Mar  7 11:01:44 1997
                 Ending time: Fri Mar  7 11:02:13 1997

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