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`8 Or 16 MB Buffer - Understanding Hard Drive Performance | Tom's Hardware
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`Understanding Hard Drive Performance
`By Patrick Schmid published March 05, 2007
`
`
`
` Comments (2)
`
`PAGE 5 OF 14:
`
`8 Or 16 MB Bu er
`
`
`
`Although there are still many drives using a 2 MB bu er, 8 MB can be considered standard today
`for mainstream desktop hard drives, and there are more and more drives with 16 MB cache as
`well. Larger hard drive caches not only make sense because of low DRAM prices, but from a
`technical standpoint as well. Hard drives utilize algorithms to pre-cache data, or to leave data in
`the cache memory in case it is requested again. Serial ATA drives also require a certain amount of
`
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`Understanding Hard Drive Performance
`By Patrick Schmid published March 05, 2007
`
`
`
` Comments (2)
`
`PAGE 5 OF 14:
`
`8 Or 16 MB Bu er
`
`
`
`Although there are still many drives using a 2 MB bu er, 8 MB can be considered standard today
`for mainstream desktop hard drives, and there are more and more drives with 16 MB cache as
`well. Larger hard drive caches not only make sense because of low DRAM prices, but from a
`technical standpoint as well. Hard drives utilize algorithms to pre-cache data, or to leave data in
`the cache memory in case it is requested again. Serial ATA drives also require a certain amount of
`
`https://www.tomshardware.com/reviews/understanding-hard-drive-performance,1557-5.html
`
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`8/15/22, 12:09 AM
`memory to store incoming commands, because most products are capable of reorganizing these
`in order to process them as e ciently as possible, requiring little physical head movement. This
`feature is called Native Command Queuing (NCQ), and it also requires some memory to work,
`although the memory requirements are minor.
`
`We wanted to check if there are di erences between drives that sport 8 MB or 16 MB of bu er
`memory. Since we had received almost the complete Seagate Barracuda 7200.10 family, we
`picked four di erent 500 GB models to answer the question. All of them use three platters and
`only vary in terms of their interfaces - SATA/300 or UltraATA/100 - and cache size.
`
`Seagate Barracuda 7200.10 500 GB Comparison Table
`
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`Health Headlines
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`Sponsored Links
`
`Manufacturer
`
`Seagate
`
`Seagate
`
`Seagate
`
`Seagate
`
`Product
`
`Model
`
`Capacity
`
`Barracuda
`7200.10
`
`Barracuda
`7200.10
`
`Barracuda
`7200.10
`
`Barracuda
`7200.10
`
`ST3500630A
`
`ST3500630AS
`
`ST3500830A
`
`ST3500830AS
`
`500 GB
`
`500 GB
`
`500 GB
`
`500 GB
`
`Spindle Speed
`
`7,200 RPM
`
`7,200 RPM
`
`7,200 RPM
`
`7,200 RPM
`
`Platter
`
`Cache
`
`Native Command Queuing
`(NCQ)
`
`3
`
`16 MB
`
`No
`
`3
`
`16 MB
`
`yes
`
`3
`
`8 MB
`
`no
`
`3
`
`8 MB
`
`yes
`
`Interface
`
`UltraATA/100
`
`SATA/300
`
`UltraATA/100
`
`SATA/300
`
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`8 Or 16 MB Buffer - Understanding Hard Drive Performance | Tom's Hardware
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`
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`2 COMMENTS
`
`COMMENT FROM THE FORUMS
`
`t30ne
`why only comparing seagate? what about WD?
`
`REPLY
`
`darkfall13
`They were comparing the minute di erences or in this case indi erences within a range of
`nearly identical hard drives. Branding really didn't matter except to just have them all the
`same...
`
`REPLY
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`VIEW ALL 2 COMMENTS
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