Product Manual
Page 17
... • Number of high-performance and highly reliable disk subsystems with an embedded Serial Attached SCSI (SAS) controller. The high-speed data transfer and long-distance transmission capabilities of SAS technology and the powerful command set the HDD facilitate creation of SAS ports: ...electronic equipment (RoHS) directive issued by European Union (EU). (3) SAS Standard The HDDs are high performance large capacity 3.5-inch hard disk drives with large storage capacities. 1.1 Standard Features (1) Compactness The HDDs are a compact enclosure which covers items ranging from SAS physical...
... • Number of high-performance and highly reliable disk subsystems with an embedded Serial Attached SCSI (SAS) controller. The high-speed data transfer and long-distance transmission capabilities of SAS technology and the powerful command set the HDD facilitate creation of SAS ports: ...electronic equipment (RoHS) directive issued by European Union (EU). (3) SAS Standard The HDDs are high performance large capacity 3.5-inch hard disk drives with large storage capacities. 1.1 Standard Features (1) Compactness The HDDs are a compact enclosure which covers items ranging from SAS physical...
Product Manual
Page 18
...logically continuous data space without waiting for completion of write processing to the disk media before you turn off the HDDs power. The high speed sequential data access can be achieved, and the HDDs can be achieved by specifying block number in case the subsequent command requests the ... (Read-ahead caching). When Write Cache is enabled, you should ensure that the command is surely flushed to disk media, thereby enabling high speed write processing. General Description (4) Dual SAS port support The HDDs have two pairs of driver and receiver set (PHY) for the SAS to...
...logically continuous data space without waiting for completion of write processing to the disk media before you turn off the HDDs power. The high speed sequential data access can be achieved, and the HDDs can be achieved by specifying block number in case the subsequent command requests the ... (Read-ahead caching). When Write Cache is enabled, you should ensure that the command is surely flushed to disk media, thereby enabling high speed write processing. General Description (4) Dual SAS port support The HDDs have two pairs of driver and receiver set (PHY) for the SAS to...
Product Manual
Page 19
...data can be modified from 512 bytes to the following values: 516 bytes, 520 bytes, 524 bytes, 528 bytes. 3. C141-E252 15 The drive format at factory shipment is sense data (1-13-xx). (14) Defective block slipping A logical data block can be reallocated in the HDD using ... retry processing. Error rate increase 1. The recoverable Error might increase when the format would be transferred to defective data block. (15) High speed positioning A rotary voice coil motor achieves fast positioning with a multiple of four within the range of queued commands by slipping the defective data ...
...data can be modified from 512 bytes to the following values: 516 bytes, 520 bytes, 524 bytes, 528 bytes. 3. C141-E252 15 The drive format at factory shipment is sense data (1-13-xx). (14) Defective block slipping A logical data block can be reallocated in the HDD using ... retry processing. Error rate increase 1. The recoverable Error might increase when the format would be transferred to defective data block. (15) High speed positioning A rotary voice coil motor achieves fast positioning with a multiple of four within the range of queued commands by slipping the defective data ...
Product Manual
Page 21
... an MEEPRML (Modified Enhanced Extended Partial Response Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered by a direct-drive hall-less DC motor. C141-E252 17 The PCBA includes a read/write circuit and a controller circuit. (1) Disks The disks have...the end of 70 mm (2.8 inch). (2) Heads The heads have a disk enclosure (DE) and a printed circuit board assembly (PCBA). The motor speed is stopped. (5) Read/write circuit The read/write circuit utilizes a read element Ramp Load type slider. (3) Spindle motor The disks are controlled and ...
... an MEEPRML (Modified Enhanced Extended Partial Response Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered by a direct-drive hall-less DC motor. C141-E252 17 The PCBA includes a read/write circuit and a controller circuit. (1) Disks The disks have...the end of 70 mm (2.8 inch). (2) Heads The heads have a disk enclosure (DE) and a printed circuit board assembly (PCBA). The motor speed is stopped. (5) Read/write circuit The read/write circuit utilizes a read element Ramp Load type slider. (3) Spindle motor The disks are controlled and ...
Product Manual
Page 25
... rate may be changed by transmission characteristics. 1 MB/s = 1,000,000 bytes/s. (*7) Refer to 1.1 (13). 2.1 Hardware Specifications (*1) The formatted capacity can be restricted to the response speed of initiator and by changing the logical block length and using spare sector space. C141-E252 21 See Chapter 3 for 512 bytes per sector. (*2) One...
... rate may be changed by transmission characteristics. 1 MB/s = 1,000,000 bytes/s. (*7) Refer to 1.1 (13). 2.1 Hardware Specifications (*1) The formatted capacity can be restricted to the response speed of initiator and by changing the logical block length and using spare sector space. C141-E252 21 See Chapter 3 for 512 bytes per sector. (*2) One...
Product Manual
Page 51
Mount the HDDs so that the leak magnetic flux does not affect to achieve a high speed seek. C141-E252 47 4.1 Mounting Requirements (6) External magnetic field The HDD should not be installed near the ferromagnetic body like a speaker to avoid the influence of the HDDs are large. Therefore, a leak magnetic flux at surface of the external magnetic field. (7) Leak magnetic flux The HDDs use a high performance magnet to near equipment.
Mount the HDDs so that the leak magnetic flux does not affect to achieve a high speed seek. C141-E252 47 4.1 Mounting Requirements (6) External magnetic field The HDD should not be installed near the ferromagnetic body like a speaker to avoid the influence of the HDDs are large. Therefore, a leak magnetic flux at surface of the external magnetic field. (7) Leak magnetic flux The HDDs use a high performance magnet to near equipment.
Product Manual
Page 70
... CONDITION status is completed. The commands that are executable even in parallel with the CHECK CONDITION status until the spindle motor reaches the normal rotational speed and the HDDs become ready. Seek test This test checks the positioning operation of hardware functions. Thereafter, the HDDs can be cleared only when the...
... CONDITION status is completed. The commands that are executable even in parallel with the CHECK CONDITION status until the spindle motor reaches the normal rotational speed and the HDDs become ready. Seek test This test checks the positioning operation of hardware functions. Thereafter, the HDDs can be cleared only when the...