raid 10 array

RAID disk array devices, which often encounter some common failures during use, also bring a lot of hard-to-estimate data risk beyond the applications that bring us massive storage space. What is the reason for the loss of RAID array information? RAID

There was a problem with a friend's server recently. After knowing that his server is assembled and configured with a RAID5 array, the system is currently unable to boot properly, and the middle of a power system is off, the data is damaged, RAID is in the process of data repair, but after the replication is complete, the system cannot start. And reinstalling the system will also report the need to format t

1. Check the RAID disk array information and confirm which to close. such as: Close md0 this array[Email protected] ~]# Cat/proc/mdstatPersonalities: [RAID6] [RAID5] [RAID4]Md0:active RAID5 sdb5[3] (S) sdb1[0] sdb2[1] sdb3[4]1043456 Blocks Super 1.2 level 5, 512k chunk, Algorithm 2 [3/3] [UUU]Unused devices:2, unload md0 This

First, Fdisk establishes a different partition and is set to the FD formatSecondly5 5 /dev/sda1/dev/sdb1/dev/sdc1/dev/sdd1/dev/sde1-C: Create a disk array-L: Disk array RAID5-N: Using 5 disks to create aThis creates a disk array/dev/md0The disk array is then formattedMkfs.ext3/dev/md0You can use this disk

/DEV/VDB1 vg0 lvm2 a--1020.00m 820.00m/DEV/VDB2 vg0 lvm2 a--1020.00m 1020.00m6.LVM SnapshotsLvcreate-l 20m-n lv0-backup-s/dev/vg0/lv0 # #给/dev/vg0/lv0 Snapshot,-l specify snapshot size,-n Specify Snapshot name-s specify Snapshot template deviceMount/dev/vg0/lv0-backup/userdateWhen the data in the snapshot device is changed, if you want to restore, delete the snapshot device, re-establish the snapshot650) this.width=650; "src=" Https://s3.51cto.com/wyfs02/M02/9D/CD/wKiom1mGmh7AZ8AFAAAnc2HFXkA505.

power-on Boot When you see this interface, press CTRL + C to enter the array card setup interface as prompted (6i card is also the case) Press ENTER directly to enter the next action Use the TAB key to switch to raid Here's how to delete the array power-on Boot The above article is the cloud Habitat Communit

//in the main method, define a two-dimensional character array of size 10*10, the array name is Y, the positive and negative diagonal is ' * ', the remaining position is ' # ', and all the elements in the array are output. Char[][]y=New Char[

PackageHanqi;ImportJava.util.Scanner; Public classTest7 { Public Static voidMain (string[] args) {//A one-dimensional integer array of size 50 is defined in the main method, the array i is named X, and the array contains {1,3,5,..., 99} Outputs all the elements in the array, with each output being

1. If the data size is less than or equal to 10 is normal2. Data size greater than 10Implementation principle of Array.Sort in 3.jsDefinition: the sort () method is used to sort the elements of an array.API syntax: Arrayobject.sort (sortby), parameter SortBy optional, used to specify collation, must be a function.How is it implemented?The V8 engine sort function gives only two sorts: Insertionsort and QuickSort, the

public static void Main (string[] args) {Method one: Using the For loopint arr[]=new int[10];for (int i = 0; i Arr[i]=r.nextint (20) +1;for (int j = 0; J if (Arr[i]==arr[j]) {i--;//}//}//}System.out.println (arrays.tostring (arr));Method two Set SethashsetRandom r = new Random ();while (Hashset.size () Hashset.add (R.nextint (10));System.out.println ("carried out");}System.out.println (HashSet);}Generates a

Suppose you know the implementation of the Add () inside the ArrayList. Do not know that we will review in detail, two-step operation, Step1 Check array capacity, Step2 plug value and will size++. --array subscript out of bounds Suppose there are 2 threads operating the same ArrayList al, and the array's capacity is just as good as a value. Thread1 execution of Add () Step1 completed, Step2 has not started

Enter the age of 10 people from prompt into the array, and sum the ages of 10 people.Enter the age of 10 people from prompt into the array, and sum the ages of 10 people.

$arr= [1, 2,-4, 4, 10,-23, 4,-5, 1]; $max _sum= 0; $sum=0; $new= []; $i= 1; Echo' ; foreach($arr as $key=$value ){ if($sum){ unset($new[$i]); $i++; $sum=$value; }Else{ $sum+=$value; } $new[$i][] =$value; if($max _sum$sum){ $max _arr=$new; $max _sum=$sum; } } Print_r($max _sum); Print_r($max _arr); Exit;An array of integers and the largest contiguous subarray, for