DevSlp or DevSleep (sometimes referred to as device sleep or SATA DEVSLP) is a feature in some SATA 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,[1] but some drives can get as low as 2.5 mW[2]). The feature was introduced by SanDisk[3] in a partnership with Intel.[4] Some think that the initiative could make laptops feel like they power on basically instantaneously,[5] while others state that this means that laptops can stay on all the time, and always be available with no adverse effects on battery life.[6]
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, and it will allow SATA link to be shut down, reducing further the power consumption.[7]
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.[7] An incompatibility between a 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.[citation needed]
External links
Description of device Sleep feature (DevSleep) at smarthdd.com
References
^Niels Broekhuijsen. "Tom's Hardware review of BIWIN announcement of using DevSlp". Tom's Hardware.
^Christopher Ryan. "Tom's Hardware review of the Transcend SSD340". Tom's Hardware.
devslp, devsleep, sometimes, referred, device, sleep, sata, devslp, feature, some, sata, devices, which, allows, them, into, power, device, sleep, mode, when, sent, appropriate, signal, which, uses, orders, magnitude, less, power, than, traditional, idle, abou. DevSlp or DevSleep sometimes referred to as device sleep or SATA DEVSLP is a feature in some SATA 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 1 but some drives can get as low as 2 5 mW 2 The feature was introduced by SanDisk 3 in a partnership with Intel 4 Some think that the initiative could make laptops feel like they power on basically instantaneously 5 while others state that this means that laptops can stay on all the time and always be available with no adverse effects on battery life 6 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 and it will allow SATA link to be shut down reducing further the power consumption 7 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 7 An incompatibility between a 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 citation needed External links EditDescription of device Sleep feature DevSleep at smarthdd comReferences Edit Niels Broekhuijsen Tom s Hardware review of BIWIN announcement of using DevSlp Tom s Hardware Christopher Ryan Tom s Hardware review of the Transcend SSD340 Tom s Hardware Kevin Parrish Toms Hardware DevSlp initiative Tom s Hardware StorageReview coverage of DevSlp standard Techspot review of feature TechSpot Brad Chacos 6 January 2012 New Power Saving DevSleep Feature Added To SATA Specification maximumpc com Retrieved 8 July 2015 a b c t Hotline SSD mit Devsleep Funktion German article c t 25 June 2014 This computer hardware article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title DevSlp amp oldid 961593631, wikipedia, wiki, book, books, library,
