MYLEX AcceleRAID 150/170/200/250/352

Seznam podporovanych radicu:

• eXtremeRAID 3000
• eXtremeRAID 2000
• AcceleRAID 352
• AcceleRAID 170
• AcceleRAID 160 (AcceleRAID 170LP)
• eXtremeRAID 1100 (DAC1164P)
• AcceleRAID 250 (DAC960PTL1)
• AcceleRAID 200 (DAC960PTL0)
• AcceleRAID 150 (DAC960PRL)
• DAC960PJ
• DAC960PG
• DAC960PU
• DAC960PD
• DAC960PL
• DAC960P
• Generic DAC960

Specifikace AcceleRAID 250:
PCI to Ultra 2 SCSI RAID Controllers, Symbios 53C895 BIOS, Podpora I2O, polovicni velikost karty, podpora SISL SCSI-1, Fast SCSI, Wide Fast SCSI, Ultra SCSI, Wide Ultra SCSI a Wide Ultra2 SCSI rozhrani RAID level 0, 1, 3, 5,0+1, 10, 30, 50 a JBOD 512KB EEPROM for BIOS Cache: min 4MB, max 128MB (Write Through/Write Back), ECC. Doporucuji min 32MB cache. Propustnost 132 MB/s. Vice informaci na http://www.mylex.com/products/index.html.

Hodne:
/proc/rd/status ... stav radice(u)
/proc/rd/c0 az /proc/rd/cN ... jednotlive radice
Hodne dlouhy vypis. Priklad:
***** DAC960 RAID Driver Version 2.2.4 of 23 August 1999 *****
Copyright 1998-1999 by Leonard N. Zubkoff
Configuring Mylex DAC960PTL1 PCI RAID Controller
Firmware Version: 4.07-0-29, Channels: 1, Memory Size: 8MB
PCI Bus: 3, Device: 5, Function: 1, I/O Address: Unassigned
PCI Address: 0xFC000000 mapped at 0xE0000000, IRQ Channel: 10
Controller Queue Depth: 124, Maximum Blocks per Command: 256
Driver Queue Depth: 123, Maximum Scatter/Gather Segments: 33
Stripe Size: 16KB, Segment Size: 16KB, BIOS Geometry: 255/63
SAF-TE Enclosure Management Enabled
Physical Devices:
0:0 Vendor: SEAGATE Model: ST318203LC Revision: 0002
Serial Number: LR214616000010052LJE
Disk Status: Online, 35565568 blocks
0:1 Vendor: SEAGATE Model: ST318203LC Revision: 0002
Serial Number: LR21333700001004HRNR
Disk Status: Online, 35565568 blocks
0:2 Vendor: SEAGATE Model: ST318203LC Revision: 0002
Serial Number: LR2136820000100600W5
Disk Status: Online, 35565568 blocks
0:3 Vendor: SEAGATE Model: ST318203LC Revision: 0002
Serial Number: LR21368100001005129T
Disk Status: Online, 35565568 blocks
0:6 Vendor: ESG-SHV Model: SCA HSBP M10 Revision: 0.03
Logical Drives:
/dev/rd/c0d0: RAID-6, Online, 71131136 blocks, Write Thru

1. Nejprve je dobre overit existenci zarizeni v adresari /dev. Pokud neexistuji, lze je vytvorit pomoci skriptu make_rd (obsazen v baliku DAC960-Utilities.tar.gz na adrese http://www.dandelion.com/Linux/DAC960.html). Pokud pouzivate devfs, potrebna zarizeni by se mela vytvorit v adresari /dev automaticky pri startu systemu (testovano s distribuci Debian GNU/Linux 2.2r6 (potato)). Doporucuji tez dukladne procist README.DAC960 (v distribuci jadra 2.4.x) a navstivit stranku http://sourceforge.net/projects/cdramon/ (monitorovaci system pro Mylex DAC960/1100 RAID radice).
2. Konfigurace, kompilace a instalace noveho jadra (zapnout podporu DAC960/DAC1100: CONFIG_BLK_DEV_DAC960=y) - viz. Kernel-HOWTO.
3. Na nekterych systemech je nutne pouzit modifikovanou verzi fdisku z baliku DAC960-Utilities.tar.gz pro vytvoreni oddilu na disku (pozor: maximalne 7 oddilu na disku: /dev/rd/cCdDp1 az /dev/rd/cCdDp7).
4. Vyzkouset, zda funguje stavajici LILO s radicem. V pripade problemu vyuzit modifikovane lilo z baliku DAC960-Utilities.tar.gz. Posledni verze GRUB 0.92 podporuje radic v plnem rozsahu.
5. Doporucuji aplikovat patch na prikaz sync, ktery vyprazdni i diskovou cache radice (bez patche se vyprazdni pouze buffer cache jadra do cache radice - tyka se starsich verzi jadra).

Velice vykonny RAID radic. Vysoka stabilita i propustnost pri velke zatezi. Podpora 16 zarizeni na radici (podle rozhrani SCSI). Podporovan v jadre Linuxu, FreeBSD, Solaris-8 (x86) Dobre se konfiguruje (radic i RAID) Cena: cca 20 000,-Kc (verze MYLEX AcceleRAID 250 s 8MB cache).