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RAID 阅读笔记
前言 .................................................................................................................................................. 1
1 RAID 概述 ............................................................................................................................... 1
1.1 RAID 在 linux 内核中的位置 ..................................................................................... 2
1.2 mdadm .......................................................................................................................... 3
1.3 参考文献 ...................................................................................................................... 3
2 RAID-5（一）基础 ................................................................................................................. 3
2.1 stripe, strip 与 P .................................................................................................. 4
2.2 RAID-5 基本原理 ......................................................................................................... 5
3 RAID-5（二）数据结构 ......................................................................................................... 5
3.1 bio 与 stripe_head .................................................................................................. 5
4 RAID-5（三）简单的读写 ..................................................................................................... 8
4.1 一次简单的读处理 ...................................................................................................... 8
4.2 一次简单的写处理 ...................................................................................................... 9
5 RAID-5（四）make_request ................................................................................................. 10
6 RAID-5（五）rmw 与 rcw .................................................................................................... 12
7 RAID-5（六）延迟写 ........................................................................................................... 13
8 RAID-5（七）Error 处理 ...................................................................................................... 14
8.1 错误处理 .................................................................................................................... 14
8.2 Bad Sector Remapping（BSR） .............................................................................. 15
9 RAID-5（八）失效处理 ....................................................................................................... 16
10 RAID-5（九）handle_stripe .............................................................................................. 17
11 RAID-5(十)raid5d 线程 ......................................................................................................... 19
12 RAID-5（十一）stripe_head 的管理 ................................................................................ 20
13 RAID-5（十二）resync 与 recovery ................................................................................. 22
14 RAID-5（十三）其它 ....................................................................................................... 24
15 Multiple Device .................................................................................................................. 25
16 MD（一）数据结构 .......................................................................................................... 27
17 MD（二）resync 和 recovery 概论 .................................................................................. 28
18 MD（三）resync 和 recovery 的调度............................................................................... 29
18.1 resync 和 recovery 的调度（上） ..................................................................... 29
18.2 resync 和 recovery 的调度（下） ..................................................................... 31
19 MD（四）进入 syncd 内部............................................................................................... 33
20 MD（五）MD 中的线程 .................................................................................................. 37
21 MD（六）小议 superblock ............................................................................................... 38
22 MD（七）In_sync 标志与 resync ..................................................................................... 39
23 RAID5 Write Hole .............................................................................................................. 41
24 Zone in RAID0 ................................................................................................................... 43
25 Data flow in Raid0 .............................................................................................................. 45
26 Chunk Aligned Read ........................................................................................................... 46
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