Dacă vi se pare incomod să depindeți de un cablu, sau să plimbați cardurile de memorie de la PC la tabletă și smartphone ori de câte ori aveți nevoie să transferați un film ori câteva fotografii sau documente, cu ajutorul PQI Air Bank puteți scăpa de deranj.
PQI Air Bank A300V este un dispozitiv de memorie portabil, care poate fi conectat cu PC-ul, tableta, smartphone-ul și cu televizorul prin WiFi sau cablu USB3. Bonus: permite partajarea unei conexiuni internet pentru dispozitivele WiFi locale.
PQI Air Bank
Așa arată A300V: are înfățișarea unui hard disk portabil tradițional, cu o cutie ușor mărită, pentru a face loc numărului mare de conexiuni și butoane, dar și pentru a permite construirea unei carcase cu un grad mai ridicat de protecție.
Așa cum spuneam și în cu alte ocazii, apreciez intenția Seagate de a oferi produse cu performanțe ridicate și cost rezonabil. Tradițional, domeniul principal de activitate al companiei Seagate a fost producerea de echipamente destinate stocării datelor: hard disk-uri. Producerea de unități SSD a fost abordată destul de timid, însă în domeniul unităților hibride Seagate a acumulat destulă experiență, cu ajutorul familiei Momentus XT. Acum, familia de unități hibride de la Seagate dobândește un nou membru: Seagate Laptop Thin SSHD.
Ceea ce sare în ochi este utilizarea termenului SSHD: Solid State Hybrid Drive în locul unei extensii seci adăugate la numele altei familii. Acronimul SSHD a fost folosit și de compania concurentă Western Digital, pentru a desemna o familie prezentată la CES 2013, însă care nu se regăsește nici la ora actuală în lista de produse ale companiei. Prin folosirea acestui nume, Seagate arată clar că nu e vorba despre un hard disk dintr-o familie specială ci că oferă o unitate de stocare hibridă.
Despre USB3 s-a tot vorbit recent, însă doar ca tehnologie implementată în plăcile de bază. Ce avantaje ofera? În specificaţiile tehnice se vorbeşte despre mărirea vitezei de transfer de 10 ori, ceea ce nu poate fi decât benefic. De la finele anului 2009 - începutul anului 2010 au fost puse pe piaţă circuitele necesare, respectiv plăci de bază care pot folosi acest nou standard.
Acum a venit şi vremea să vedem dispozitive care pot beneficia de avantajele noii tehnologii, mai exact hard disk-uri. Dacă ratele maximale de transfer ale unui hard disk conectat prin interfaţă USB2 nu depăşesc 30 MB/s, nu la fel stau lucrurile şi pe interfaţa USB3. Noile hard disk-uri A-Data disponibile la eMAG sunt capabile de a transfera datele de trei ori mai rapid (aproximativ 90 MB/sec.), factorul limitator fiind de data aceasta platanele hard disk-ului şi nu interfaţa spre PC.
Evident, pentru a putea beneficia de performanţa maximă, aveţi nevoie ca echipamentul cu care faceţi conexiunea să fie compatibil USB3, altfel nu se poate observa diferenţa. Pentru a face un PC produs inainte de finele anului trecut compatibil USB3, aveţi posibilitatea de a îi adăuga un adaptor PCI (express) USB3 sau să upgradaţi placa de bază din PC.
Entry level SAS/SATA RAID controllers for a small server or a fast workstation
This list contains the entry-level/value SAS/SATA RAID controllers with internal ports, as listed by VMWare I/O compatibility tool on 2009-08-13. If you use or intend to use a controller with external ports, or a controller from other vendors (HP, DELL, fujitsu, IBM etc) do a check on VMWare web site, I haven't listed here all the SAS/SATA RAID controllers. I need to have this nicely formatted, so I can find easy where to choose from if i need a SAS/SATA controller for a small server, or a workstation, since most controllers are compatible with Windows too. For Windows the list could be much longer, since not all SAS RAID controllers are tested by VMWare, I only put here the ones that may be useful for a VMWare ESXi server running on a DIY platform. There may be many other SAS/RAID controllers usable with VMWare, but these listed below are definitely usable for VMFS volumes. Adaptec Entry level / value SAS/SATA RAID Controllers compatible with VMWare ESX
Adaptec RAID 2405: Entry level SAS/RAID controller, 4 internal ports, low profile form factor, 800 MHz processor, PCI Express x8. Supports RAID levels 0, 1, 10, 128 MB DDR2 cache memory, up to 128 SAS or SATA drives using SAS expanders. Supports ESX / ESXi 4.0. Price: ~ $270 (US)
Adaptec RAID 3405: Value line SAS/RAID controller, 4 internal ports, Low profile form factor, Intel 80333 500 MHz processor, PCI Express x4 bus interface. Supports RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD, using 128 MB cache memory. Supports up to 128 SATA or SAS drives using SAS expanders, optional battery backup. Supports ESX/ESXi 4. Price: ~ $400 (US)
Adaptec RAID 3805: Value line SAS/RAID controller, 8 internal ports, Low profile form factor, Intel 80333 500 MHz processor, PCI Express x4 bus interface. Supports RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD, using 128 or 256 MB cache memory. Supports up to 128 SATA or SAS drives using SAS expanders, optional battery backup. Supports ESX/ESXi 4. Price: ~ $575 (US)
Adaptec RAID 31205: Value line SAS/RAID controller, 12 internal ports, half-length/full-height form factor, Intel 80333 800 MHz processor, PCI Express x8 bus interface. Supports RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD, 256MB ECC cache, up to 128 SATA or SAS devices using SAS expanders, optional battery backup. Price: ~ $795 (US)
Adaptec RAID 31605: Value line SAS/RAID controller, 16 internal ports, half-length/full-height form factor, Intel 80333 800 MHz processor, PCI Express x8 bus interface. Supports RAID levels 0, 1, 1E, 5, 5EE, 6, 10, 50, 60, JBOD, 256MB ECC cache, up to 128 SATA or SAS devices using SAS expanders, optional battery backup. Price: ~ $995 (US)
Intel Entry level / value SAS/SATA RAID Controllers compatible with VMWare ESX
Intel® RAID Controller SRCSAS144E: Mid-range (Mainstream) PCI-E SAS controller, PCI Express x4 bus interface, 4 internal ports, 4 external ports, Low profile PCI: 7.71" x 2.535" form factor, Intel IOP 80333 processor at 500 MHz, LSI 1068 3.0 GB/s SAS/SATA IO controller, supports up to 32 devices via expanders, 128 MB embedded memory, audible alarm. Price: $549 at NewEgg, without cables.
Intel® RAID Controller SRCSASRB: Mid-range (Mainstream) PCI-E SAS controller, Low profile, extended half-length (7.75" x 2.525") form factor, PCI Express x4 bus intreface, 256 MB ECC DDR2 cache memory, LSI1078 SAS ROC (RAID on Chip) at 500 MHz and dual-independent DMA controllers. Supports RAID Levels 0, 1, 5 and 6, 10, 60, 60, online capacity expansion, enclosure management, SMART. Supports up to 32 devices, through two SFF8087 mini-SAS 4i internal connectors. It uses Intel® Smart Battery AXXRSBBU4. Price: ~ $375.
Intel® RAID Controller SASWT4I is a PCI-E SAS Controller, with 4 internal ports. It is built around LSI1064E chip, a well-known chip used by many server boards. It is able to use RAID levels 0,1,1E,10E. According to Intel's documentation, this controller is verified to work with ESX3 and ESXi3.
LSI Entry level / value SAS/SATA RAID Controllers compatible with VMWare ESX
LSI MegaRAID SAS 8344 ELP SAS RAID Adapter: Mid-range (Mainstream) PCI-E SAS controller, PCI Express x4 bus interface, low profile form factor, 4 internal ports, 4 external ports, supports up to 32 devices via expanders, RAID levels 0, 1, 5, 10, 50, max. 32 drives (4 per port using expanders), 128 MB embedded cache memory, audible alarm. Price: unknown. This controller looks identically to Intel RAID Controller SRCSAS144E.
LSI MegaRAID SAS 8708ELP: Value line eight-port PCI Express SAS Controller, low profile form factor, PCI Express x4, LSI SAS 1078 RAID on Chip (ROC) (500 MHz power-pc processor, hardware RAID 5 & 6 parity engines), 129 MB DDRII cache, optional battery backup unit, RAID levels 0, 1, 5, 6, 10, 50, 60, auto-resume (rebuild, reconstruction), online capacity expansion, online RAID level migration, single controller multipath, I/O load balancing, two Mini-SAS SFF-8078 x4 connectors.
HP SAS/SATA RAID controllers compatible with VMWare ESX
HP SmartArray E200. This is a 8-port SAS/SATA RAID controller with PCI Express x4 bus interface. Form factor: SmartArray E200/64MB: full height PCI Express long card. RAID levels supported: 0,1,0+1. RAID 5 is available with 128MB Battery-Backed Write Cache (BBWC) upgrade option. It seems that HP prefers to put reliability first with this controller, because the controller disables a SATA hard disk drive's write cache, making it unable to write faster than 11 MB/sec at default settings. Fortunately, drive's write cache can be re-enabled by HP Array management tools. Yes... these tools may require a running operating system with HP smart Array tools installed (ESXi may not be suited for this task), but there is a solution. A second note regarding this card: it is a VERY long card (more than 30 cm), and it may require hard disk drive relocation or a new case, if not used in a system with E-ATX motherboard/case. I can confirm that it fits into Antec Sonata III 500, if used with a dual PCI-Express x16 motherboard, like Gigabyte EP45-UD3P, mounted on the second PCI-Express x16 slot.
IBM SAS/RAID controllers compatible with VMWare ESX
IBM ServeRAID-BR10il SAS/SATA Controller v2 is a small form factor (MD2) controller built around LSI 1064E, PCI Express x4 bus interface and 2MB flash memory. RAID levels supported: 0,1, 1E. Stripe size is fixed, 64KB. The drives can be attached through an SFF 8087 mini-SAS connector, only internal drives, up to 14 disks.This controller does not support more than 2 logical volumes or SAS / SATA drive mixing.
There are some losses when using ESXi and some RAID controllers: it's possible to loose the advantages of using RAID configuration and monitoring tools like 'Adaptec Storage Manager', so you must check your arrays by other means.
