33. Sisteme RAID: nivelele 0 si 1. Functionare, avantaje, dezavantaje Flashcards

1
Q

In consta RAID?

A

daca discurile se defecteaza continutul este refacut din informatia
redundanta memorata

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2
Q

Ce este RAID? (reduntant arrays of (inexpensive) disks)

A

tehnologie folosita pentru stocarea datelor ce permite utilizarea mai multor HDD-uri intr-o entitate pentru a imbunatati performanta sau disponibilitatea spatiului de stocare

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3
Q

Ce este RAID 0?

A

discuri in stripping

fisierele sunt impartite in fâşii (stripe) pe mai multe discuri (par/impar)

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4
Q

Care sunt avantajele RAID 0?

A
design facil, implementare simpla
performanta ridicata la scriere si citire
intreaga capacitate de stocare folosita
uzura mica
acces rapid
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5
Q

Care sunt dezavantajele RAID 0?

A

lipsa redundantei

defectarea oricarui disc duce la pierderea datelor

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6
Q

Ce este RAID 1?

A

discuri in mirroring
cel mai sigur nivel RAID
fiecare disc este duplicat pe “oglinda” (mirror)

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7
Q

Care sunt avantajele RAID 1?

A

implementare facila
redundanta 100%
disponibilitate ridicata

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8
Q

Care sunt dezavantajele RAID 1?

A

capacitate de stocare injumatatita (scriere de 2 ori)
metoda scumpa
disc picat de neinlocuit

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9
Q

La ce este folosit RAID 1?

A

stocare in situatii critice (sisteme bancare si de gestiune)

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10
Q

La ce este folosit RAID 0?

A

folosit in aplicatii de editare imagini/video

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