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In traditional low-power modes, SATA link still needs to remain powered on to allow the device to receive a wake-up command. With DevSlp, rarely used 3.3 V pins of the SATA power plug will be used for the DevSlp signal instead of providing 3.3 V power. This signal can wake up the drive,
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Due to the way they work, DevSleep-enabled drives may not be suitable for most desktop PCs and some notebooks with the 3.3 V voltage present in their SATA power connectors; the presence of 3.3 V results in DevSleep-enabled drives remaining in DevSlp state. An incompatibility between a
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devices which allows them to go into a low power "device sleep" mode when sent the appropriate signal, which uses one or two orders of magnitude less power than a traditional idle (about 5 mW, but some drives can get as low as 2.5 mW). The feature was introduced by
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desktop mainboard and a SATA SSD may be resolved by disabling the DevSleep feature using a power connector adapter that does not pass the +3.3 V line.
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and it will allow SATA link to be shut down, reducing further the power consumption.
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185:"New Power-Saving DevSleep Feature Added To SATA Specification"
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Description of device Sleep feature (DevSleep) at smarthdd.com
85:"Tom's Hardware review of BIWIN announcement of using DevSlp"
213:"c′t Hotline SSD mit "Devsleep"-Funktion (German article)"
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104:"Tom's Hardware review of the Transcend SSD340"
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16:Low-power feature in some SATA devices
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123:"Toms Hardware DevSlp initiative"
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219:. 25 June 2014. Archived from
183:Brad Chacos (6 January 2012).
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261:. You can help Knowledge by
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227:16 November
32:SATA DEVSLP
308:Serial ATA
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151:2014-08-20
71:References
170:TechSpot
24:DevSleep
41:SanDisk
194:8 July
20:DevSlp
253:This
45:Intel
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