Answer:
One of the most common problems in RAID (Level 1 and 5) is that when a drive fails there is a high probability that another drive in the array can fail. The problem is that the RAID array and the data it constains are being left ion a vulnerable status during a disk replacement and the new disk is being filled with data. Also it takes longer to rebuild failed drives, this means that during the period of time that the new disk is being filled with data the chance of a second failing drive is higher.
That is a problem with RAID level 1-5
RAID level 1. Is disk mirroring, duplicating data without striping? This method can improve disk performance, but the number of disks needed is doubled, including having good reliability because it has back up for each disk and repairing damaged disks can be done quickly because there is a mirror.
RAID level 2. Organizing with error correction code (ECC). Like in memory where the detection has an error using bit parity. For example, for example, for example, each byte in the data, has a corresponding parity of bits that represents the number of "1" bits in the data byte where the bit parity = 0 if the even bits or the parity bits = 1 if the bits are odd.
RAID level 3. It is an organization with interleaved bit parity. This organizing is almost the same as RAID level 2, the difference is that at level 3 it only requires a red disk, regardless of disk collection, this can be done because the disk controller can check whether a sector is read correctly or not (damaged or not).
RAID level 4. It is an organization with interleaved block parity, i.e. uses data striping at the block level, stores a block part on a separate disk for each data block on other corresponding disks.
RAID level 5. Is the organization with the largest interleaved block parity. Data and parity are crossed on all disks including an additional disk. In each block, one disk stores parity and the other disk stores data. For example, if there is a collection of 5 disks, the parity of the nth block will be stored on disk (n mod 5) +1, the nth block of the other 4 disks stores the actual data of the block.
Learn More
RAID https://brainly.com/question/13627000
Level 1-5 https://brainly.com/question/13627000
Details
Class: High School
Subject: Computer and Technology
Keywords: RAID, level, disk
