LSI 9265-8i MegaRAID Card vs Adaptec 6805 RAID Card – The Ultimate 6Gb/s RAID Showdown

EXTERNAL CHARACTERISTICS

The Adaptec card utilizes the low-profile MD2 form factor which measures 6.6″ x 2.536″ and keeps the overall footprint very small. The engine behind this RAID controller is the PMC-Sierra PM8013 Dual Core RAID on Chip (ROC).

The heatsink with the blue shrouding covers the ROC that is the brains of this unit. You can see a connector underneath the words “Adaptec” that is used for plugging in a ZMCP (Zero-Maintenance Cache Protection) module that we will cover later in the review. To the rear of the card you can see the two connectors for the 8087 cables that will allow each port to be connected to either a 4 drive SAS/SATA fanout, or an expander. Utilizing an expander this card can control up to 256 drives.

SPECIFICATIONS

FEATURES

  • Supports up to 256 SATA or SAS devices using SAS expanders
  • RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60 and JBOD
  • Hybrid RAID 1 & 10
  • Quick initialization
  • Online Capacity Expansion
  • Copyback Hot Spare
  • Dynamic caching algorithm
  • Native Command Queuing (NCQ)
  • Background initialization
  • Hot-plug drive support
  • RAID Level Migration
  • Hot spares – global, dedicated, and pooled
  • Automatic/manual rebuild of hot spares
  • SES and SAF-TE enclosure management
  • Configurable stripe size
  • S.M.A.R.T. support
  • Multiple arrays per disk drive
  • Dynamic sector repair
  • Staggered drive spin-up
  • Bootable array support
  • Optimized Disk Utilization

BENEFITS

  • 6Gb/s performance Unified Serial RAID controllers support both SATA and SAS devices and offer unique features including Zero Maintenance
  • Ideal for bandwidth intensive storage applications; NAS, online transaction processing servers (OLTP), web servers, digital surveillance and streaming applications.
  • Customer Needs High I/O transaction and high bandwidth processing; solutions that reduce energy consumption and maintenance costs
  • Zero Maintenance Cache Protection (extra unit)
    Maximizes performance and extends power savings by protecting data in controller cache without incurring monitoring, replacement or
    disposal costs.
    Support for full installation lifecycle up to ten years ensuring data availability and reducing total cost of ownership.
  • Intelligent Power Management
    Automated customer-configurable feature that reduces disk drive energy use by up to 70% without compromising application
    performance. Two configurable modes supported:
    Standby mode low-power mode; spins disks at lower RPMs (must be supported by disk drive).
    Power-off mode Spin down drives when not in use.

42
Leave a Reply

avatar
28 Comment threads
14 Thread replies
0 Followers
 
Most reacted comment
Hottest comment thread
22 Comment authors
NormlaurensE71rsqMoheban79 Recent comment authors
  Subscribe  
newest oldest most voted
Notify of
Eero Rantala
Guest
Eero Rantala

I unfortunately have the Adaptec 6805 controller and… LOL… where is my garbage can…
I’m running a setup with 4x Kingston 240GB HyperX in R5, the ATTO results arent that shabby… I get 1.5GB/s write and 2.1GB/s read (seq) but…. the short random reads are just terrible… in Winsat it’s only 170 MB/s(!?!).
Funny thing is that when I turn off controller cache I get 9000 MB/s in sequential 64 read… 🙂
I dont however get more than 5ms max response time vs your 55ms value.

Eero Rantala
Guest
Eero Rantala

Winsat with all cache OFF (Swedish W7): > Disk Sequential 64.0 Read 8922.99 MB/s 7.9 > Disk Random 16.0 Read 183.16 MB/s 7.6 > Responsiveness: Average IO Rate 1.01 ms/IO 7.9 > Responsiveness: Grouped IOs 7.94 units 7.5 > Responsiveness: Long IOs 1.98 units 7.9 > Responsiveness: Overall 15.69 units 7.9 > Responsiveness: PenaltyFactor 0.0 > Disk Sequential 64.0 Write 576.71 MB/s 7.9 > Genomsnittlig l„stid med sekventiella skriv†tg„rder0.494 ms 7.9 > Svarstid: 95:e percentilen 0.936 ms 7.9 > Svarstid: maximal 2.820 ms 7.9 > Genomsnittlig l„stid med slumpm„ssiga skrivningar0.542 ms 7.9

Eero Rantala
Guest
Eero Rantala

Winsat all cache ON: > Disk Sequential 64.0 Read 1207.40 MB/s 7.9 > Disk Random 16.0 Read 170.22 MB/s 7.6 > Responsiveness: Average IO Rate 0.26 ms/IO 7.9 > Responsiveness: Grouped IOs 4.58 units 7.9 > Responsiveness: Long IOs 0.45 units 7.9 > Responsiveness: Overall 2.04 units 7.9 > Responsiveness: PenaltyFactor 0.0 > Disk Sequential 64.0 Write 882.76 MB/s 7.9 > Genomsnittlig l„stid med sekventiella skriv†tg„rder0.239 ms 7.9 > Svarstid: 95:e percentilen 1.013 ms 7.9 > Svarstid: maximal 5.359 ms 7.9 > Genomsnittlig l„stid med slumpm„ssiga skrivningar0.326 ms 7.9

Eero Rantala
Guest
Eero Rantala

Next steps to do:
PC –> Adaptec –> Garbage bin
LSI –> PC

Eero Rantala
Guest
Eero Rantala

Hahaaa… my 6805 beats the LSI in the AS SSD copy benchmark 2 of 3:
ISO 880 / 1.22
Program 377 / 3.73
Game 701 / 1.97