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Too many drives: Difference between revisions
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(Created page with "How many hard drives can we pack into a consumer workstation? ==Considerations== * Space * Heat * Max power draw, PSU * Max power draw, cables * Controllers ==See also== * "[http://www.45drives.com/blog/uncategorized/power-draw-of-enterprise-class-hard-drives-versus-consumer-class-drives/ Power Draw of Enterprise vs Consumer Class Drives]", 45drives * "[http://www.45drives.com/blog/uncategorized/staggered-spinup-and-its-effect-on-power-draw/ Staggered spinup and its E...") |
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How many hard drives can we pack into a consumer workstation? | How many hard drives can we pack into a consumer workstation? A hard drive requires its maximum power draw upon initial spinup | ||
==Considerations== | ==Considerations== | ||
| Line 5: | Line 5: | ||
* Space | * Space | ||
* Heat | * Heat | ||
* Max power draw, PSU | * Max 12V power draw, PSU | ||
* Max power draw, cables | * Max 5V power draw, PSU (not relevant for newer drives) | ||
* Max power draw, cables + connectors | |||
* Controllers | * Controllers | ||
==Seagate Exos 18== | |||
From the manual, we learn a peak DC draw of 2.88A @ 12V, 34.56W(!). A typical AWG18 wire can safely conduct 9.5A. A AWG16 can do about 15. Without staggered spinup, it is thus probably unsafe to put more than 5 drives on a single AWG16 wire, or 3 on AWG18. | |||
==See also== | ==See also== | ||
* "[http://www.45drives.com/blog/uncategorized/power-draw-of-enterprise-class-hard-drives-versus-consumer-class-drives/ Power Draw of Enterprise vs Consumer Class Drives]", 45drives | * "[http://www.45drives.com/blog/uncategorized/power-draw-of-enterprise-class-hard-drives-versus-consumer-class-drives/ Power Draw of Enterprise vs Consumer Class Drives]", 45drives | ||
* "[http://www.45drives.com/blog/uncategorized/staggered-spinup-and-its-effect-on-power-draw/ Staggered spinup and its Effect on Power Draw]", 45drives | * "[http://www.45drives.com/blog/uncategorized/staggered-spinup-and-its-effect-on-power-draw/ Staggered spinup and its Effect on Power Draw]", 45drives | ||
* Seagate [https://www.seagate.com/www-content/product-content/enterprise-hdd-fam/exos-x18-channel/_shared/en-us/docs/100865854c.pdf Exos 18] manual | |||
Latest revision as of 01:55, 30 January 2022
How many hard drives can we pack into a consumer workstation? A hard drive requires its maximum power draw upon initial spinup
Considerations
- Space
- Heat
- Max 12V power draw, PSU
- Max 5V power draw, PSU (not relevant for newer drives)
- Max power draw, cables + connectors
- Controllers
Seagate Exos 18
From the manual, we learn a peak DC draw of 2.88A @ 12V, 34.56W(!). A typical AWG18 wire can safely conduct 9.5A. A AWG16 can do about 15. Without staggered spinup, it is thus probably unsafe to put more than 5 drives on a single AWG16 wire, or 3 on AWG18.
See also
- "Power Draw of Enterprise vs Consumer Class Drives", 45drives
- "Staggered spinup and its Effect on Power Draw", 45drives
- Seagate Exos 18 manual
