다음 이전 차례

1. 소개

  1. Q: RAID 란 무엇인가?
    A RAID 는 ''Redundant Array of Inexpensive Disks' 의 약자로, 각각의 디스크 들을 묶어서 빠르고 안전한 디스크 시스템을 만드는 것이다.

    RAID stands for "Redundant Array of Inexpensive Disks", and is meant to be a way of creating a fast and reliable disk-drive subsystem out of individual disks. In the PC world, "I" has come to stand for "Independent", where marketing forces continue to differentiate IDE and SCSI. In it's original meaning, "I" meant "Inexpensive as compared to refrigerator-sized mainframe 3380 DASD", monster drives which made nice houses look cheap, and diamond rings look like trinkets.

  2. Q: 이 문서는 무엇인가?
    A: 이 문서는 Linux MD kernel 확장에 관한 tutorial/HOWTO/FAQ 문서이다. MD 확장은 RAID-0,1,4,5 를 소프트웨어 적으로 지원하고, 이것을 통해 우리는 특별한 하드웨어나 디스크 콘트롤러 없이 RAID 를 사용해 볼수 있다.

    This document is a tutorial/HOWTO/FAQ for users of the Linux MD kernel extension, the associated tools, and their use. The MD extension implements RAID-0 (striping), RAID-1 (mirroring), RAID-4 and RAID-5 in software. That is, with MD, no special hardware or disk controllers are required to get many of the benefits of RAID.

    This document is NOT an introduction to RAID; you must find this elsewhere.

  3. Q: Linux 커널은 어떤 레벨의 RAID 를 지원하는가?
    A: RAID-0 은 2.x 버전의 리눅스 커널들이 지원한다. 이것은 이해하기 쉽고, 몇몇의 매우 큰 유즈넷 뉴스 서버에 사용된다.

    Striping (RAID-0) and linear concatenation are a part of the stock 2.x series of kernels. This code is of production quality; it is well understood and well maintained. It is being used in some very large USENET news servers.

    RAID-1, RAID-4, RAID-5 는 커널 2.1.63 이상의 버전에서 지원한다. 2.0.x 와 2.1.x의 커널들은 패치를 해야 한다. 커널을 업그레이드 해야 한다고 생각하지 마라. 업그레이드보다. 패치가 훨씬 쉬울 것이다.

    RAID-1, RAID-4 & RAID-5 are a part of the 2.1.63 and greater kernels. For earlier 2.0.x and 2.1.x kernels, patches exist that will provide this function. Don't feel obligated to upgrade to 2.1.63; upgrading the kernel is hard; it is *much* easier to patch an earlier kernel. Most of the RAID user community is running 2.0.x kernels, and that's where most of the historic RAID development has focused. The current snapshots should be considered near-production quality; that is, there are no known bugs but there are some rough edges and untested system setups. There are a large number of people using Software RAID in a production environment.

    RAID-1 hot reconstruction has been recently introduced (August 1997) and should be considered alpha quality. RAID-5 hot reconstruction will be alpha quality any day now.

    A word of caution about the 2.1.x development kernels: these are less than stable in a variety of ways. Some of the newer disk controllers (e.g. the Promise Ultra's) are supported only in the 2.1.x kernels. However, the 2.1.x kernels have seen frequent changes in the block device driver, in the DMA and interrupt code, in the PCI, IDE and SCSI code, and in the disk controller drivers. The combination of these factors, coupled to cheapo hard drives and/or low-quality ribbon cables can lead to considerable heartbreak. The ckraid tool, as well as fsck and mount put considerable stress on the RAID subsystem. This can lead to hard lockups during boot, where even the magic alt-SysReq key sequence won't save the day. Use caution with the 2.1.x kernels, and expect trouble. Or stick to the 2.0.34 kernel.

  4. Q: 어디에서 커널의 패치를 구할 수 있나요?
    A: Software RAID-0 and linear mode are a stock part of all current Linux kernels. Patches for Software RAID-1,4,5 are available from http://luthien.nuclecu.unam.mx/~miguel/raid. See also the quasi-mirror ftp://linux.kernel.org/pub/linux/daemons/raid/ for patches, tools and other goodies.
  5. Q: Linux RAID 에 관한 다른 문서들이 있나요?
    A:
  6. Q: 이 문서에 대해 누구에게 불평해야 하죠?
    A: Linas Vepstas slapped this thing together. However, most of the information, and some of the words were supplied by

    Copyrights

    • Copyright (C) 1994-96 Marc ZYNGIER
    • Copyright (C) 1997 Gadi Oxman, Ingo Molnar, Miguel de Icaza
    • Copyright (C) 1997, 1998 Linas Vepstas
    • By copyright law, additional copyrights are implicitly held by the contributors listed above.

    Thanks all for being there!

다음 이전 차례