百度首页 | 百度空间
 
查看文章
 
raid
2008-04-17 07:50

RAID0是将两个磁盘连接变成一个逻辑磁盘,结果是我们得到了一个120GB的逻辑磁盘,数据是分别写在2个磁盘中的,读取时从2个盘中一起读,可以成倍的提高存储子系统的性能。但这种方法安全性是最差的,一旦有一个硬盘损坏,所有数据就都没有了。

RAID1是将2个硬盘划分为两部分,一个存数据,另一个做备份,也就是说80GB存数据80GB做备份。这样的数据安全性是最好的,但磁盘空间利用率很低,只有50%。

至于RAID0+1/1+0和RAID5是要用4个或以上的硬盘才能组建的。

RAID0+1是先将多块盘做成RAID0, 然后将两个大的虚拟盘做成RAID1.如果是4块盘A,B,C,D如果要做RAID0+1, 可以使用A, C建立一个RAID0, B, D建立一个RAID0,然后将这两个RAID0做成一个RAID1。

RAID1+0是先将多块盘做成RAID1, 然后将两个大的虚拟盘做成RAID0. 如果是4块盘A,B,C,D如果要做RAID0+1, 可以使用A, B建立一个RAID1, C, D建立一个RAID1,然后将这两个RAID1做成一个RAID0。

在RAID0+1方案中,如果A出现损坏,则A,C组成的RAID0将不可使用,此时如果B,D中的某一块盘出现问题,则将导致整个RAID0+1失效。

在RAID1+0方案中,如果A出现损坏,则A,B组成的RAID1将不可使用,此时如果不是B损坏或者C,D同时损坏,整个阵列依然可用。

相比而言RAID1+0比RAID0+1具有更高的可用性,而性能上几乎没有差异。

RAID0+1对比RAID1+0的唯一好处就是组成两个RAID0的磁盘个数和容量可以不一致,而RAID1+0则要求所有的磁盘容量完全一致。

RAID1+0又被称为RAID10


22051: Serious security concern: event log error 4201
22052: Live data processing by using WF.
22053: MMCSS and audio in Exclusive mode.
22054: check disk locking up
22055: AVI File Writer not removed from the graph using RemoveFilter method
22056: Admin Only Application modification on Vista
22057: Windows Workflow Foundation Web Approvals Starter Kit Released
22058: MSDTC Not avialable
22059: Persistence and Tracking Services
22060: SetWindowsHookEx issue in Vista
22061: more information
22062: Where is IIS in Vista 5219?
22063: Base classes compile problem with Vista SDK
22064: Windows Mobile Device Driver Update
22065: How to have more than one HandleExternalEvent Activities inside a state in parallel
22066: InstallLocation not being written to the registry when my msi is run (test 19)
22067: designtime: detect activity move
22068: Page Limit?
22069: WorkflowParameterBinding
22070: Installing Microsoft Visual Studio 2005 Extensions for Windows Workflow Foundation installs Windows SDK Instead
22071: Closing osk.exe from other application
22072: Passing parameters into the workflow.
22073: Bind to an activity's Property Dialog Box
22074: The method to keep track of control changes with "IControlChangeNotify::OnNotify"?
22075: The flowed transaction could not be unmarshaled.
22076: TransactionScope & TSQL Transactions
22077: TTF Font Installation in Vista
22078: Event Queue operation failed with MessageQueueErrorCode QueueNotFound for queue
22079: Relying Party Certificate thumbprint not specified
22080: Tutorials on WF and WPF
22081: Closing osk.exe from other application
22082: list all active users in a domain - second try
22083: .NET Framework Configuration Tool
22084: ping command in .bat is not working through IE7 in windows vista
22085: Sound Problem
22086: How to transform a Byte[] object containing ink (ISF) to a Byte[] readable by Crystal Report with .NET 2.0?
22087: FreeCoTaskMem (Memory Access Exception) in Vista, fine in XP .NET 2
22088: Is ISampleGrabberCB::BufferCB is called only on Motion Detection?
22089: Smart Card Application
22090: How to get(set) cursor position in my service before logon?
22091: How can we control the "Enhancements" page under device Properties page?
22092: about exception "Queue '......' ' is not enabled."
22093: Application won't elevate with manifest
22094: InkCanvas selection adorner
22095: How to record from 'Wave' or 'Stereo Mix' in Vista?
22096: openthreadtoken fails on Windows Vista but not on Windows XP
22097: RichTx32 merge module
22098: background windows flickers on top of fullscreen application in vista.
22099: How does the STS encrypt the token?
22100: Please Help! Communication from App to Workflow and visa versa
22101: WM ASF Writer memory leak?
22102: VMR9Allocator in fullscreen
22103: Debugging Declarative Rule Condtions?
22104: RegOpenKeyEx error that image not found
22105: Question about IFileSystemImage
22106: Merge Modules & Vista Certification (Test Case 23)
22107: Unable to find a control using UIAutomation
22108: How to activitybind with a registerattached property in xoml?
22109: MFC Project(C++) vs compilation error with IDI_SHIELD, BCM_SETSHIELD, Button_SetElevationRequired and friends
22110: TDI interface
22111: I understand the HOW and WHAT, but i have trouble with WHY, and WHEN?
22112: Elapsed time in Delay Activity
22113: New USB Devices not recognized in Vista
22114: SOAP fault handling
22115: How to get(set) cursor position in my service before logon?
22116: Per Application Volume in Vista
22117: error code # 643
22118: What is Service Contract
22119: Is the Start button pressed or not?
22120: Doom and Gloom in Vista DAW land
22121: Activities with Collection Properties + Undo...
22122: Installation Directory Write Access Issue
22123: WCF / WF Orcas - ReceiveActivity
22124: Activity Designer
22125: Windows Vista and Com/Serial Ports
22126: Stream files byte array to xps
22127: RMTool problem
22128: Add/Remove Programs in Windows Vista
22129: Send SCSI Command Fail in Vista
22130: Per App Volume not working for pure MIDI application
22131: Parent and Child Workflow in Persistence DB
22132: distributed transaction flow marshalling error
22133: Modify the text content pages in an XPS document
22134: RMTool Test Case 30
22135: I The requested operation requires elevation.
22136: Add rule into existing ruleset
22137: Building XPS printer driver on windows XP
22138: Outlook 2003 or 2007 RPC/Http using Vista
22139: File copy doesn't work well in Vista C#
22140: Control missing when running program, shows up when stepping through program
22141: looking for web editor for business processes for WWF
22142: Random Vista crashes
22143: Can I ignore an external event fired to a custom HandleExternalEventActivity based on an event param?
22144: picture package (sony dvd handycam-software)compatibility with windows vista?
22145: Rehydration of workflows after modifying ExternalDataExchange interfaces/eventargs
22146: Unable to receive notifications from DFileSystemImageEvents interface
22147: Wifi channel number detection of an AP
22148: Adding Images
22149: I have a strange question about StateMachineWorkflow in Asp.Net,help!
22150: fast image downsampling/upsampling
22151: How to assign task to user via rules and rulesets
22152: Software submission legal document signing problem
22153: WH_JOURNALPLAYBACK and timing broken on Windows Vista
22154: How can I delete pages from already created XPS document? (how can I Replace, Insert pages also)
22155: managed XP CD writing extension
22156: Temporary admin rights?
22157: Momento SideShow
22158: connection between a .NET COM and a WF module
22159: Accessing Activity-Properties in Declarative Rule Expression

类别:默认分类 | 添加到搜藏 | 浏览() | 评论 (0)
 
最近读者:
 
网友评论:
发表评论:
姓 名:
网址或邮箱: (选填)
内 容:
验证码:
 

     

©2008 Baidu