[plamo:15400] ＤＵＭＰのスピードがでない。

[ishiguro tatsuo]

石黒と申します。

Compaq AIT-100/200 (AIT-3と言うタイプ）を購入しましたが、スピードが
１／１０以下となって悩んでいます。実際、BUSYランプが、１秒間隔くらいで点
滅してフルに動作していない感じです。メーカーに問い合わせるとドライバーが
悪いからと言われました。Dumpの動作を早くする方法があるのでしょうか？ログ
ではext3ですが、ext2でも同じです。

[仕様]
plamo linux 2.2.6　を　linux kernel 2.4.18に上げて使用しています。
scsi カード　　Adaptec 29160/JA kit
mt　のバージョン　mt-st v. 0.7
dump　のバージョン　dump 0.4b29 (using libext2fs 1.19 of 13-Jul-2000)

------ 実行コマンド-------------------------------------------------
 # バックアップ作業
/bin/mt -f /dev/tape rewind
/bin/mt -f /dev/tape compression 1
/usr/local/sbin/dump 0uBf 200000000 /dev/tape $BKDIR
/bin/mt -f /dev/tape rewind

参考URL
http://linux.compaq.co.jp/product/hardware/option/tape/ait100.html
http://linux.compaq.co.jp/support/faq_hard/hard_1.html#dds45
---------------------------------------------------------------------

-------実行結果のログ-------------------------------
  DUMP: Date of this level 0 dump: Tue Aug 20 03:02:10 2002
  DUMP: Dumping /dev/sda6 (/smb/bk/pub) to /dev/tape
  DUMP: Added inode 8 to exclude list (journal inode)
  DUMP: Added inode 7 to exclude list (resize inode)
  DUMP: Label: none
  DUMP: mapping (Pass I) [regular files]
  DUMP: mapping (Pass II) [directories]
  DUMP: estimated 46763767 tape blocks on 0.23 tape(s).
  DUMP: Volume 1 started with block 1 at: Tue Aug 20 03:04:38 2002
  DUMP: dumping (Pass III) [directories]
  DUMP: dumping (Pass IV) [regular files]
  DUMP: 0.72% done at 1107 kB/s, finished in 11:38
  （途中省略）
  DUMP: 100.00% done at 1397 kB/s, finished in 0:00
  DUMP: Closing /dev/tape
  DUMP: Volume 1 completed at: Tue Aug 20 12:26:12 2002
  DUMP: Volume 1 47106070 tape blocks (46002.02MB)
  DUMP: Volume 1 took 9:21:34
  DUMP: Volume 1 transfer rate: 1398 kB/s
  DUMP: 47106070 tape blocks (46002.02MB) on 1 volume(s)
  DUMP: finished in 33694 seconds, throughput 1398 kBytes/sec
  DUMP: Date of this level 0 dump: Tue Aug 20 03:02:10 2002
  DUMP: Date this dump completed:  Tue Aug 20 12:26:12 2002
  DUMP: Average transfer rate: 1398 kB/s
  DUMP: DUMP IS DONE
----------------------------------------------------

----- cat /proc/scsi/aic7xxx/0 -------------------------
Adaptec AIC7xxx driver version: 6.2.4
aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
Channel A Target 0 Negotiation Settings
        User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
        Goal: 160.000MB/s transfers (80.000MHz DT, offset 31, 16bit)
        Curr: 160.000MB/s transfers (80.000MHz DT, offset 31, 16bit)
        Channel A Target 0 Lun 0 Settings
                Commands Queued 13105960
                Commands Active 0
                Command Openings 123
                Max Tagged Openings 123
                Device Queue Frozen Count 0

Channel A Target 6 Negotiation Settings
        User: 160.000MB/s transfers (80.000MHz DT, offset 255, 16bit)
        Goal: 80.000MB/s transfers (40.000MHz, offset 127, 16bit)
        Curr: 80.000MB/s transfers (40.000MHz, offset 127, 16bit)
        Channel A Target 6 Lun 0 Settings
                Commands Queued 13804873
                Commands Active 0
                Command Openings 1
                Max Tagged Openings 0
                Device Queue Frozen Count 0
------------------------------------------------------------------------