RAID για σκληρούς δίσκους

[gpanitsi]

Καλησπέρα σας παιδιά

 

Έχω 2 σκληρούς 80 GB maxtor SATA και έναν ακόμη 160 GB SATA. Τι raid ειναι το καλυτερο? Ενα raid 0 για τους δυο 80αρηδες και τον αλλο μονο του?

[dpolal]

Δεν υπάρχει καλύτερο και χειρότερο raid...

Εσύ τί θέλεις να κάνεις;;;;;;;;

[gpanitsi]

tespa prepei na exeis dikio

 

alla poia einai h diafora raid 0 ,raid 1 raid 0+1 kai jbod?

 

please kapoia eksighsh

[alfas]

2 HDD x 80GB

Raid 0: ftiaxneis ena disko me sinolo ti xoritikotita ton 2 ogdontaridon kai o opios einai pio grigoros apo oti oi 2 ogdontarides mazi!! Bebaia an xtipisei o enas apo tous 2 diskous...anti amigos se ola ta data!!

 

Raid 1: Kanei mirroring diladi exeis 1 80ari kai ta dedomena tou antigrafontai ston 2ro- edo an pa8ei kati o enas exeis ton allon- san taxitities einai pio xamiles apo to raid0

 

To raid 0+1 to xrisimopioume otan oi diskoi einai panomiotipoi(aderfakia me liga logia gia asfalestera apotelesmata)

 

 

 

JBOD stands for "Just a Bunch of Disks" or "Just a Bunch of Drives".

 

This is basically a storage method where multiple disks in an array are just treated as a single contiguous volume by the operating system.

 

Se kalipsa ka8olou ?

 

 

 

Brika kai auto tora...to para8etw

 

JBOD just combines drives into 1 bigger drive. So if you put a 20GB drive and a 40GB drive and configured them as a JBOD you'd have:

 

20GB + 40GB = 60GB

 

and your OS would see a 60GB drive.

 

Files are not distributed in any special way, so there is no performance gain.

 

RAID is slightly different.

 

RAID 0 enhances performance by striping the data across the drives - i.e. a little bit of each files is written on each drive. When reading files, performance is enhanced because it can read a little from each drive at the same time instead of reading the whole file from one drive.

 

An example of RAID 0 would be if you have two 20GB Drives:

 

20GB + 20GB = 40GB

 

And your OS would ses a 40GB drive. Note you have to use matched drive sizes. If you were to use a 20GB drive and a 40GB drive, you'd have the following:

 

20GB + 40GB = 40GB (20GB unused)

 

RAID 1 is for data integrity. Each hard drive is a mirror of each other. In the event that one of them fails, you can use the second drive to boot up and then put in a new drive and rebuild the RAID. Note that you cannot do that with RAID 0 if one of the drives fails. So for RAID 1, if you have two 20GB drives:

 

20GB + 20GB = 20GB

 

Your OS sees a 20GB drive. Note you must again use matched drive sizes.

 

RAID 0+1 combines striping with mirroring, and you need a minimum of 4 drives for that configuration, and they must be matched drive sizes (you can use mismatched drives, but the larger drives will lose whatever extra capacity they have so they can stripe/mirror the other drives)

 

So JBOD allows you to maintain the full capacity of all the drives you have together into one disk for the OS to see. It is not very secure should a drive fail, and there is absolutely no performance benefit from it.

[gpanitsi]

Seuxaristw gia tis polutimes plhrofories

Exw kataliksei na kanw tous duo 80arides raid 0.

Ton 160ari omws ti mporw na ton kanw?

[alfas]

ston 160ari baze ta dedomena sou!! ta back up sou..i oti allo goustareis kai tis efarmoges-games ktl apo to raid gia na ekmetaleuteis kai tin taxitita pou 8a sou dosoun(alla mi fantasteis... tora treli diafora etsi...alla 8a uparxei)

Ego isos na to kana etsi... kai malista ton 160ari an ton i8ela na ton metafero 8a ton ebaza se rack(e3oteriki 8ikoula) me usb2 gia na ton pao kai opou goustaro an xriastei!!

H apofasi diki sou...