Chinaunix首页 | 论坛 | 博客
  • 博客访问: 91876
  • 博文数量: 30
  • 博客积分: 300
  • 博客等级: 二等列兵
  • 技术积分: 253
  • 用 户 组: 普通用户
  • 注册时间: 2011-12-08 00:35
文章分类

全部博文(30)

文章存档

2012年(16)

2011年(14)

我的朋友

分类: LINUX

2012-06-19 09:19:50

如果在中需要改变默认的参数如压缩、块大小、缓冲区等,可以使用

  smit工具。

  具体的方法如下:

  1)确定中要修改的设备

  # lsdev -Cc tape

  smc0 Available 14-08-00-6,0 3583 Library Medium Changer

  rmt0 Available 14-08-00-0,0 3580 Ultrium Tape Drive

  rmt1 Available 14-08-00-1,0 3580 Ultrium Tape Drive

  rmt2 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc1 Available 30-68-01 3584 Library Medium Changer (FCP)

  rmt3 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc2 Available 30-68-01 3584 Library Medium Changer (FCP)

  rmt4 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc3 Available 30-68-01 3584 Library Medium Changer (FCP)

  通过上面的信息我们可以知道系统连接了两个磁带库:

  a)连接的3583smc0带两个驱动器rmt0,rmt1

  smc0 Available 14-08-00-6,0 3583 Library Medium Changer

  rmt0 Available 14-08-00-0,0 3580 Ultrium Tape Drive

  rmt1 Available 14-08-00-1,0 3580 Ultrium Tape Drive

  b)用光纤连接的3584,三个驱动器各自的control path都被使能。

  rmt2 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc1 Available 30-68-01 3584 Library Medium Changer (FCP)

  rmt3 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc2 Available 30-68-01 3584 Library Medium Changer (FCP)

  rmt4 Available 30-68-01 3580 Ultrium Tape Drive (FCP)

  smc3 Available 30-68-01 3584 Library Medium Changer (FCP)

  1.1)假设我们要修改连接的3583上的 ID=2的驱动器的参数:

  通过分析我们可以确定rmt1 ID1,正是我们要修改的对象。

  1.2)假设我们要修改光纤连接的3584上的驱动器的参数:

  我们还要通过三个驱动器的WWN来区分他们。首先驱动器的WWN可以

  通过驱动器上面的标签得到,然后你可以使用lsattr命令得到WWN

  设备名的对应关系:

  #lsattr -El rmt2

  block_size 0 Block Size (0=Variable Length) True

  compress yes Use Hardware Compression on Tape True

  autoload no Use Autoloading Feature at End-of-Tape True

  logging no Activate volume information logging True

  max_log_size 500 Maximum size of log file (in # of entrIEs) True

  space_mode Backward Space/Forward Space Record Mode True

  rew_immediate no Use Immediate Bit in Rewind Commands True

  trailer_labels no Trailer Label Processing True

  retain_reserve no Retain Reservation False

  devtype ULT3580- Device Type False

  _id 0x213ca Target ID True

  lun_id 0x0 Logical Unit Number True

  location Location True

  ww_name 0x5005076300410803 World Wide Name False

  new_name New Logical Name True

  1.3)如果驱动器上没有WWN标签,或复杂的环境,或使用FC--GATAWAY

  的情况我们可以通过交换机来确定,限于篇幅这里不做介绍。

  2)参数:

  3.1)显示现有参数的命令:

  # lscfg -vl rmt1

  DEVICE LOCATION DESCRIPTION

  rmt7 30-68-01 3580 Ultrium Tape Drive (FCP)

  Manufacturer................

  Machine Type and Model......ULT3580-TD1

  Serial Number...............6811288675

  Device Specific.(FW)........25D4

  #lsattr -El rmt2

  block_size 0 Block Size (0=Variable Length) True

  compress yes Use Hardware Compression on Tape True

  autoload no Use Autoloading Feature at End-of-Tape True

  logging no Activate volume information logging True

  max_log_size 500 Maximum size of log file (in # of entries) True

  space_mode Backward Space/Forward Space Record Mode True

  rew_immediate no Use Immediate Bit in Rewind Commands True

  trailer_labels no Trailer Label Processing True

  retain_reserve no Retain Reservation False

  devtype ULT3580- Device Type False

  _id 0x213ca Target ID True

  lun_id 0x0 Logical Unit Number True

  location Location True

  ww_name 0x5005076300410803 World Wide Name False

  new_name New Logical Name True

  3.2)设置参数的方法:

  我们可以使用SMIT工具修改某一个指定的设备。

  具体方法是:

  3.2.1)#SMITTY

  3.2.2)选择菜单Devices -> Tape Drive -> Change/Show

  Characteristics of a Tape Drive.

  3.2.3)选择我们指定的设备

  3.2.4)修改参数:

  Change / Show Characteristics of a Tape Drive

  Type or select values in entry fields.

  Press Enter AFTER making all desired changes.

  [Entry Fields]

  Tape Drive rmt0

  Tape Drive type 3580

  Tape Drive interface

  Description 3580 Ultrium Tape

  Status Available

  Location 14-08-00-0,0

  Parent adapter 1

  Connection address 0,0

  Block Size (0=Variable Length) [0]

  Use Hardware Compression on Tape yes

  Activate volume information logging no

  Maximum size of log file (in # of entries) [500]

  Backward Space/Forward Space Record Mode

  Use Immediate Bit in Rewind Commands no

  Trailer Label Processing no

  比如我们可以修改不使用硬件压缩

  Use Hardware Compression on Tape no

  这种修改是永久生效的。

阅读(2764) | 评论(0) | 转发(0) |
给主人留下些什么吧!~~