Abstract: A JBOD apparatus (1) having a hard disk drive (HDD) expander (11), a switch (13) and a BMC module (12) is disclosed. The HDD expander (11) is connected to a plurality of hard drives (5) respectively. The switch (13) connects the HDD expander (11) with a connecting port (14) for enabling a first transmission channel, or connects the HDD expander (11) with the BMC module (12) for enabling a second transmission channel. The BMC module (12) is connected to an Ethernet through a network port (17). The HDD expander (11) initially receives a wired transmitted command through the first transmission channel. When the BMC module (12) receives an Ethernet transmitted command through the Ethernet, it controls the switch (13) to change for enabling the second transmission channel, therefore, the BMC module (12) executes an interactive operation with the HDD expander (11) in accordance with the Ethernet transmitted command.

Abstract: A JBOD apparatus (1) having a hard disk drive (HDD) expander (11), a switch (13) and a BMC module (12) is disclosed. The HDD expander (11) is connected to a plurality of hard drives (5) respectively. The switch (13) connects the HDD expander (11) with a connecting port (14) for enabling a first transmission channel, or connects the HDD expander (11) with the BMC module (12) for enabling a second transmission channel. The BMC module (12) is connected to an Ethernet through a network port (17). The HDD expander (11) initially receives a wired transmitted command through the first transmission channel. When the BMC module (12) receives an Ethernet transmitted command through the Ethernet, it controls the switch (13) to change for enabling the second transmission channel, therefore, the BMC module (12) executes an interactive operation with the HDD expander (11) in accordance with the Ethernet transmitted command.

Abstract: A rack having a plurality of fans and a plurality of servers divided into several groups is presented. Each of the servers calculates fan speed needed for heat dissipating based on internal temperatures, and outputs the calculated fan speed to the fans in same group respectively. The fans in the same group run according to the received fan speed. A rack management controller (RMC) in the rack obtains the fan speed outputted by a server in one of the several groups, and calculates a fan speed compensating value based on the obtained fan speed. The RMC then outputs the fan speed compensating value to fans in neighboring groups to make it to run according to the fan speed compensating value.

Abstract: A control module of a node comprising a baseboard management controller (BMC), a first memory and a second memory is present. The first memory stores a working firmware, the second memory stores a default firmware. The BMC normally connects with the first memory and reads the working firmware to boot during a booting procedure. If the BMC cannot boot through executing the working firmware after a firmware updating procedure executed for updating the working firmware failed, it switches to connect with the second memory and reads the default firmware to replace with the working firmware to boot. After the BMC boots through the default firmware successfully, it switches back to connect with the first memory, and re-updates the working firmware again.

Abstract: A rack comprising a control module and a plurality of nodes is present. The control module comprises a rack management controller (RMC), and each of the plurality of nodes comprises a baseboard management controller (BMC). The RMC communicates with the BMCs respectively through a plurality of default communication channels, and the RMC controls the nodes and transmits necessary data thereto through the BMCs. When losing response signal from one of the BMCs, the RMC resends same signal to the non-responded BMC. If a resend threshold is achieved, the RMC sends a control signal to a reset pin of the non-responded BMC directly through a GPIO channel to force the non-responded BMC to reset.

Abstract: A telescopic water gun includes an inner tube, with an end coupled with a water outlet gun and another end sleeved with an outer tube, which has a deformable restraint ring and blocking sleeve disposed at the sleeving end, an upper end of the blocking sleeve being disposed with an outer thread section screwed with a pressing sleeve for tightly sleeving on the outer thread section; a water inlet connector sleeved at another end of the outer tube disposed with a water receiving end and a smaller diameter sleeving end, a large diameter water stopping section and small diameter water stopping section therebetween; and a water inlet controlling sleeve sleeving around the water controlling section with its inner diameter, a large diameter opening formed at a lower end of the water inlet controlling sleeve for sleeving around the a large diameter water stopping section of the water inlet connector.

Abstract: A telescopic water gun includes an inner tube, with an end coupled with a water outlet gun and another end sleeved with an outer tube, which has a deformable restraint ring and blocking sleeve disposed at the sleeving end, an upper end of the blocking sleeve being disposed with an outer thread section screwed with a pressing sleeve for tightly sleeving on the outer thread section; a water inlet connector sleeved at another end of the outer tube disposed with a water receiving end and a smaller diameter sleeving end, a large diameter water stopping section and small diameter water stopping section therebetween; and a water inlet controlling sleeve sleeving around the water controlling section with its inner diameter, a large diameter opening formed at a lower end of the water inlet controlling sleeve for sleeving around the a large diameter water stopping section of the water inlet connector.