Sandisk Corporation

Western Digital Technologies, Inc.

Sandisk Il Ltd.

Sandisk Technologies Inc.

Asher Druck

Rotem Sela

Yosi Pinto

Aviad Zer

Amir Tsuri

Nir Perry

Einav Zilberstein

Matthew Davidson

Lakhdar Iguelmamene

Alexander Lemberg

Ralph Heron

Rony Tal

Yosi Zatelman

Giora Ariel

Noam Even-chen

A data storage device includes a memory device and a controller coupled to the memory device. The controller is configured to maintain a plurality of virtual pools, wherein each virtual pool corresponds with an logical block address (LBA) range, update a counter of a virtual pool, wherein the counter corresponds to a health of the LBA range, and select, based on the counter, the virtual pool to program data to. The controller is further configured to maintain a counter for each application having data programmed to the virtual pool, where the counter is increased for each write operation to the virtual pool. When the counter equals or exceeds a threshold value, the controller is configured to send a warning to each application associated with the virtual pool having the counter that equals or exceeds the threshold value.

Virtual block pools for protecting device health

A mobile data storage device (DSD) incorporating a mobile data storage device (DSD), the mobile DSD comprising a non-volatile storage medium configured to store user data, a data path configured to transmit at least data between the mobile DSD and a host computer system, a housing having a machine readable optical code and a controller. The controller is configured to receive, from the data path, a request to restore the mobile DSD to factory settings. The controller also receives, from the data path, a unique access passcode derived from the machine readable optical code. The controller validates the unique access passcode, and, in response to determining that the unique access passcode is valid, restores the mobile DSD to factory settings.

Restore to factory settings of a mobile data storage device

A storage system uses blocks of memory that are sized larger than a size of a zone. This means that the storage system stores multiple zones in a given block. Storing zones with different zone properties in a given block can be problematic, so the storage system obtains zone property information for each zone and stores zones with similar zone properties in a given block.

Storage system and method for data placement in zoned storage

An interface for use of device whose core circuitry operates in one voltage domain, but exchanges signal with another device (or 'host') according a different voltage domain, and the use of such an interface for supplying data using a double data rate (DDR) transfer, is presented. One concrete example of this situation is a memory card, where the internal circuitry uses one voltage range for its core operating voltages, but exchanges signals with a host using different, input/output voltage range. According to a general set of aspects, the interface receives data signals from the device at the device's core operating voltage domain, individually level shifts these to the input/output voltage domain, and then combines them into a DDR signal for transfer to the host device, where a (non-level shifted) clock signal from the host device is used as the select signal to form the DDR data signal.

Enhancement of input/output for non source-synchronous interfaces

Assigning addresses to legacy sharing at least one signal line with a plurality of client devices. Each of the devices includes a number of I/O pins selected ones of which are connected to the at least one signal line and each client device includes a first and a second initialization pin. In the described embodiment, all but a first one of the plurality of client devices are connected to one another in a daisy chain arrangement by way of the first and the second initialization pin separate from the signal line. A first client device has a first initialization pin that is independently held at a first logic level and a second initialization pin that is connected to the daisy chain arrangement. The first one of the client devices is initialized and, in turn, triggers initialization of the daisy chained client devices. The legacy device is initialized separately from the client devices.

Addressing multiple devices on a shared bus

A system and a method for asynchronously signaling interrupts from a plurality of devices in a computing system, while optimizing the latencies in handling the interrupts. In a particular embodiment, an interrupt is signaled via a plurality of daisy chained devices by handing over the interrupt request from one device to another while retaining information regarding any interrupts handed over (also referred to as passed). In this way, the interrupt source can be readily identified (using a binary search, for example) thereby reducing interrupt latency and memory resources required to retain interrupt history.

Signaling an interrupt request through daisy chained devices

A removable electronic circuit card has multiple modules connected to the card's bus in parallel so that each module can exchange commands and data independently with the host. According to a first aspect of the present invention, this achieved by a controller-to-controller interface whereby the modules can facilitate their interactions with the host. In a first set of embodiments, the modules are on a single card, while in a second set of embodiments the modules are distributed across multiple cards, where a first card attaches to the host and other cards attach to the first card rather than directly to the host. In all of these cases, the host sees the multiple modules as a single card having a single module. In a further aspect of the present invention, the card or cards are able to communicate with the host in more than one protocol.

Growing community of inventors

Nahariya, Israel

Asher Druck