Shulou(Shulou.com)06/03 Report--

Windows system administration

Check your own public IP: www.ip138.com

Network disk service: data sharing remote customers

data backup and recovery

Data backup: data security to avoid data loss;

Backup object: system; data

Cold backup of data:

A way to perform backups without the documents to be backed up being occupied

Advantages: simple and quick, easy to restore to a certain point in time, easy to maintain

Disadvantages: can only be restored to a certain point in time, during the backup of data inconvenience normal use

Data hot backup:

A backup is performed without affecting the use of data

Advantages: Short backup time, no impact on data usage, can achieve second-level recovery

Cons: All operations are synchronized, including deletion

Backup operation: system comes with backup--Settings--System and Security--Settings backup

Reduction:

Third-party backup: You can enter PE system and generate ghost backup system files with ghost software.

System Impression Recovery

Mistaken data recovery: third-party software: easyrecovery professional

Win Disk Application Mode

Basic disk: traditional disk, default is basic disk, fixed disk size, inconvenient expansion, limited number

Dynamic disk: support a variety of special function volumes; for example, realize dynamic volume size adjustment, disk high availability, etc.

Basic disk partition: primary partition; extended partition; logical partition. Logical partitions cannot be created until all three primary partitions have been created

Dynamic Disk:

Need to perform conversion of basic disk--> dynamic disk

Conversion operations:

When converted to dynamic disks, primary and logical partitions automatically become simple volumes; dynamic disks cannot be converted to basic disks unless all volumes are deleted

Create a cross-roll:

Multiple disks are required, allowing for fragmentation

Create striped dynamic volumes; implement concurrent read and write of multiple disks to improve I/O speed

Assignment: Briefly describe the characteristics and differences between windows basic disk and dynamic disk

1) Changes in disk capacity

Dynamic disks: You can change the size of disk capacity without rebooting and without losing data

Basic disk: Once a partition is created, it cannot be changed in size unless special disk utility software is used

2) Disk space limitations

Dynamic disks: can be expanded to include discontiguous disk space, create cross-physical volumes, combine several disks into one large volume

Basic disk: must agree to disk space can be divided into a contiguous partition, partition maximum capacity is disk capacity

3) Number of volume sets or partitions

Dynamic: There is no limit to the number of volume sets created on a disk

Basic: Up to 4 primary partitions per disk

4) Disk configuration information:

Dynamic: Disk configuration information is placed on disk. It can be copied to other dynamic disks by RAID fault-tolerant system, so it can be transferred to other computers for further use.

Basic: Disk configuration information is stored in the disk boot partition or, if RAID fault tolerance is used, in the registry. Therefore, RAID disks can lose information when moved to other computers

Briefly describe the characteristics and differences of cross-section roll, strip roll and RAID5

Spanned volume: A spanned volume is a volume that contains space on multiple disks (32 for most). The order in which data information is stored in a spanned volume is to fill the first disk and store it gradually on subsequent disks. Through the establishment of spanning volumes, we can allocate free space in multiple physical disks into a volume, utilizing resources. But spanning volumes does not improve performance or fault tolerance

Stripe devolume: A volume consisting of free space on two or more disks, where data is divided into 64Kb blocks when writing to a striped volume, and then different data is written to each disk in the array simultaneously. This process significantly improves disk efficiency and performance, but strip-devolume does not provide fault tolerance

RAID-5: Tape de-volumization with parity, which ensures superior performance of tape de-volumization while providing fault tolerance. RAID-5 volumes contain at least 3 disks and up to 32. If any disk in the array fails, the information in the other two disks can be used to perform operations and recover the data in the failed disk.

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