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720 H5803 V732( )S12 R930(\267)S11 R1105(Writing/reading)S1839(pipes)S2104(&)S2223(FIFO's)S2574(to)S2693(verify)S2987(pipe)S3209(operation)S3656(and)S3847(performance.)S720 H5933 V732( )S12 R930(\267)S11 R1105(Initiating)S1546(multiple)S1951(processes)S2407(to)S2530(test)S2720(optimizations)S3357(of)S3485(bu)S3595 H (f)show 11 -.5 mul h (f)show11 R3663(er)S3784(cache,)S4096(device)S4418(drivers,)S4788(and/or)S5106(intelli-)S720 H6063 V1105(gent)S1332(controllers.)S1900(This)S2134(is)S2246(also)S2461(useful)S2767(to)S2891(test)S3082(multiple)S3488(device)S3811(access)S4127(and)S4323(for)S4488(loading)S4856(the)S5028(I/O)S5211(sub-)S720 H6193 V1105(system.)S720 H6323 V732( )S12 R930(\267)S11 R1105(Force)S1401(I/O)S1594(at)S1720(di)S1806 H (f)show 11 -.5 mul h (f)show11 R1874(erent)S2139(memory)S2552(boundaries)S3080(to)S3213(test)S3413(low)S3625(level)S3885(driver)S4193(handling.)S4687(Using)S4998(the)S5180(align)S720 H6453 V1105(option,)S1451(you)S1652(can)S1839(set)S1997(memory)S2399(alignment)S2874(for)S3036(testing)S3365(specialized)S3886(device)S4206(driver)S4502(DMA)S4793(code.)S5095(This)S5326(is)S720 H6583 V1105(very)S1332(useful)S1633(when)S1903(developing)S2424(new)S2639(I/O)S2818(sub-systems.)S720 H6713 V732( )S12 R930(\267)S11 R1105(Do)S1282(loopback)S1727(testing)S2064(of)S2198(parallel)S2569(or)S2703(serial)S2983(lines)S3234(on)S3387(either)S3679(the)S3856(same)S4124(system)S4473(of)S4607(di)S4693 H (f)show 11 -.5 mul h (f)show11 R4761(erent)S5023(systems.)S720 H6843 V1105(This)S1341(is)S1455(a)S1543(useful)S1851(compatibility)S2479(test)S2672(when)S2949(running)S3330(di)S3416 H (f)show 11 -.5 mul h (f)show11 R3484(erent)S3741(machines)S4194(running)S4575(di)S4661 H (f)show 11 -.5 mul h (f)show11 R4729(erent)S4986(operating)S720 H6973 V1105(systems.)S720 H7690 V2909(Page 2)S7920 VEP%%PageTrailer%DEC_EDMS_Folio: 4%%Page: 3 5BP/slant 0 def/height 1.000000 def11 R11 R720 H670 V11 I720(Users Manual for)S4507(February 2nd, 2001)S720 H800 V720(dt - Data Test Program)S4832(Version 14.1)S720 H1210 V732( )S12 R930(\267)S11 R1105(Enable)S1449(POSIX)S1807(Asynchronous)S2481(I/O)S2667(to)S2793(verify)S3094(proper)S3419(operation)S3873(of)S4004(this)S4204(API)S4421(and)S4619(to)S4746(determine)S5225(per-)S720 H1340 V1105(formance)S1559(gains)S1833(\(over)S2105(standard)S2518(synchronous)S3115(I/O\).)S3400(This)S3638(is)S3754(also)S3973(useful)S4282(for)S4450(queuing)S4845(multiple)S5254(I/O)S720 H1470 V1105(requests)S1497(to)S1616(drivers)S1953(and)S2144(for)S2304(testing)S2631(SCSI)S2898(tag)S3065(queuing)S3452(and)S3643(RAID)S3944(con\256gurations.)S720 H1600 V732( )S12 R930(\267)S11 R1105(Specify)S1473(variable)S1858(record)S2169(options)S2527(for)S2687(testing)S3014(variable)S3399(tape)S3614(devices.)S720 H1730 V732( )S12 R930(\267)S11 R1105(On)S1292(Tru64)S1613(cluster)S1958(systems,)S2388(distributed)S2912(lock)S3154(manager)S3583(\(DLM\))S3953(options)S4332(can)S4537(be)S4694(used)S4949(to)S5089(control)S720 H1860 V1105(access)S1416(to)S1535(shared)S1853(devices)S2214(or)S2338(\256les.)S720 H1990 V732( )S12 R930(\267)S11 R1105(Also)S1350(available)S1782(on)S1929(Tru64)S2234(UNIX)S2544(is)S2655(the)S2826(ability)S3145(to)S3269(use)S3453(Extended)S3905(Error)S4173(Information)S4735(\(EEI\))S5015(to)S5139(detect)S720 H2120 V1105(and)S1296(recover)S1655(from)S1901(SCSI)S2168(bus/device)S2670(resets)S2952(\(tape)S3203(is)S3310(repositioned)S3886(for)S4046(continuing)S4550(the)S4717(test\).)S720 H2387 V12 B720(4)S852(Program)S1347(Options.)S720 H2553 V11 R970(This)S1200(section)S1545(describes)S1986(program)S2392(options)S2752(and)S2945(and)S3138(special)S3477(notes)S3744(related)S4076(to)S4197(each.)S4492(The)S11 I4697(dt)S11 R4818(help)S5042(\256le)S5218(pro-)S720 H2683 V720(vides)S988(a)S1072(summary)S1517(of)S1644(the)S1814(options,)S2203(and)S2397(the)S2567(default)S2907(value)S3179(of)S3305(most)S3555(options.)S3976(The)S11 I4181(dt)S11 R4302(help)S4526(summary)S4970(for)S5132(Tru64)S720 H2813 V720(UNIX)S1026(is)S1133(shown)S1453(in)S1572(Appendix)S2038(A.)S720 H2979 V12 B720(4.1)S942(Input)S1266(File)S1496(")S12 I1563(if=)S12 B1713(")S1816(Option.)S720 H3145 V11 R970(This)S1207(option)S1530(speci\256es)S1949(the)S2124(input)S2392(\256le)S2574(to)S2701(open)S2956(for)S3125(reads.)S3458(The)S3670(device)S3997(is)S4113(opened)S4471(read-only)S4932(so)S5072(devices)S720 H3275 V720(which)S1021(only)S1250(permit)S1570(or)S1694(support)S2057(read)S2277(access,)S2616(e.g.,)S2836(parallel)S3197(input)S3457(devices,)S3846(can)S4030(be)S4166(opened)S4515(successfully.)S720 H3470 V720(Special)S1076(Notes:)S720 H3600 V732( )S12 R930(\267)S11 R1105(Data)S1351(read)S1578(is)S1692(automatically)S2330(veri\256ed)S2705(with)S2941(the)S3116(default)S3461(data)S3684(pattern,)S4057(unless)S4373(you)S4579(disable)S4931(this)S5132(action)S720 H3730 V1105(via)S1272(the)S1439(")S11 I1484(disable=compare)S11 R2260(")S2338(option.)S720 H3860 V732( )S12 R930(\267)S11 R1105(Extra)S1397(pad)S1610(bytes)S1897(of)S2043(sizeof\(int\),)S2576(are)S2763(allocated)S3213(at)S3347(the)S3536(end)S3749(of)S3895(data)S4132(bu)S4242 H (f)show 11 -.5 mul h (f)show11 R4310(ers,)S4520(initialized)S5015(with)S5266(the)S720 H3990 V1105(inverted)S1502(data)S1722(pattern,)S2092(and)S2288(then)S2515(veri\256ed)S2888(after)S3124(each)S3360(read)S3584(request)S3937(to)S4060(ensure)S4382(the)S4553(end)S4748(of)S4876(data)S5095(bu)S5205 H (f)show 11 -.5 mul h (f)show11 R5273(ers)S720 H4120 V1105(didn't)S1410(get)S1586(overwritten)S2133(by)S2286(\256le)S2470(system)S2819(and/or)S3142(device)S3470(drivers.)S3878(This)S4117(extra)S4378(check)S4675(has)S4864(found)S5163(prob-)S720 H4250 V1105(lems)S1346(with)S1575(\257ushing)S1964(DMA)S2253(FIFO's)S2604(on)S2747(several)S3089(machines.)S720 H4481 V11 C984(Syntax:)S720 H4611 V1248(if=filename)S2370(The)S2634(input)S3030(file)S3360(to)S3558(read.)S720 H4842 V12 B720(4.2)S942(Output)S1353(File)S1583(")S12 I1650(of=)S12 B1826(")S1929(Option.)S720 H5008 V11 R970(This)S1200(option)S1516(speci\256es)S1928(the)S2096(output)S2412(\256le)S2587(to)S2707(open)S2954(for)S3115(writes.)S3479(After)S3744(the)S3913(write)S4173(portion)S4526(of)S4652(the)S4821(test,)S5037(the)S5206(dev-)S720 H5138 V720(ice)S886(is)S998(closed)S1316(\(to)S1476(reposition)S1954(to)S2078(start)S2305(of)S2434(\256le)S2613(or)S2742(to)S2866(rewind)S3208(the)S3380(tape\),)S3664(re-opened,)S4166(and)S4362(then)S4589(a)S4675(read)S4900(veri\256cation)S720 H5268 V720(pass)S951(is)S1067(performed.)S1625(If)S1739(you)S1946(wish)S2196(to)S2324(prevent)S2695(the)S2872(read)S3102(verify)S3406(pass,)S3666(you)S3874(must)S4132(specify)S4491(the)S4668(")S11 I4713(disable=verify)S11 R5355(")S720 H5398 V720(option.)S720 H5593 V720(Special)S1076(Notes:)S720 H5723 V732( )S12 R930(\267)S11 R1105(Terminal)S1544(devices)S1909(are)S11 B2078(not)S11 R2268(closed)S2585(between)S2986(passes)S3303(so)S3439(previously)S3941(set)S4101(terminal)S4505(characteristics)S5168(don't)S720 H5853 V1105(get)S1272(reset.)S1572(This)S1801(also)S2011(caused)S2341(a)S2422(race)S2635(condition)S3084(when)S3354(doing)S3638(loopback)S4073(testing)S4400(with)S4629(two)S4827(processes.)S720 H5983 V732( )S12 R930(\267)S11 R1105(When)S1416(testing)S1760(terminal)S2176(\(serial\))S2535(devices,)S2941(modem)S3321(control)S3682(is)S3806(disabled)S4222(\(via)S4442(setting)S4787(CLOCAL\))S5314(to)S720 H6113 V1105(prevent)S1468(tests)S1699(from)S1947(hanging.)S2397(If)S2504(the)S2673(")S11 I2718(enable=modem)S11 R3401(")S3481(option)S3798(is)S3907(speci\256ed,)S4360(then)S4584(CLOCAL)S5058(is)S5166(reset,)S720 H6243 V1105(hangup)S1471(on)S1624(close)S1892(HUPCL)S2296(is)S2413(set,)S2606(and)S2807(testing)S3144(will)S3359(not)S3543(preceed)S3924(until)S4170(carrier)S4496(or)S4631(DSR)S4890(is)S5008(detected.)S720 H6373 V1105(This)S1334(code)S1573(is)S1680(not)S1854(fully)S2095(tested,)S2412(but)S2586(this)S2779(description)S3300(accurately)S3781(describes)S4221(the)S4388(code.)S720 H6503 V732( )S12 R930(\267)S11 R1105(At)S1255(the)S1429(present)S1785(time,)S2049(tapes)S2314(are)S2486(rewound)S2909(by)S3059(closing)S3417(the)S3592(device,)S3946(so)S4085(you)S11 B4291(must)S11 R4564(specify)S4921(the)S5096(rewind)S720 H6633 V1105(device)S1430(during)S1757(testing)S2091(if)S2198(the)S2372(read)S2599(verify)S2900(pass)S3129(is)S3242(being)S3525(performed.)S4080(This)S4315(restriction)S4799(will)S5010(probably)S720 H6763 V1105(change)S1462(in)S1596(the)S1778(next)S2015(release)S2365(since)S2638(magtape)S3058(control)S3418(commands)S3943(will)S4164(be)S4316(supported)S4798(\(tape)S5065(speci\256c)S720 H6893 V1105(tests)S1334(as)S1458(well\).)S720 H7690 V2909(Page 3)S7920 VEP%%PageTrailer%DEC_EDMS_Folio: 5%%Page: 4 6BP/slant 0 def/height 1.000000 def11 R11 R720 H670 V11 I720(Users Manual for)S4507(February 2nd, 2001)S720 H800 V720(dt - Data Test Program)S4832(Version 14.1)S720 H1210 V732( )S12 R930(\267)S11 R1105(A)S1220(special)S1560(check)S1850(is)S1960(made)S2233(for)S2396(the)S2566(/dev/)S2822(pre\256x,)S3142(and)S3336(if)S3439(located,)S3820(the)S3991(O_CREAT)S4523(open)S4773(\257ag)S4975(is)S5086(cleared)S720 H1340 V1105(to)S1245(prevent)S1627(accidently)S2131(creating)S2537(\256les)S2775(in)S2915(this)S3129(directory)S3578(when)S3869(not)S4063(specifying)S4573(the)S4760(correct)S5115(device)S720 H1470 V1105(name)S1375(\(very)S1638(easy)S1865(to)S1984(do)S2127(when)S2397(running)S2772(tests)S3001(as)S3125(super-user)S3613('root'\).)S720 H1600 V732( )S12 R930(\267)S11 R1105(When)S1403(writing)S1758(to)S1881(raw)S2081(disks)S2345(on)S2492(Tru64)S2797(UNIX,)S3135(if)S3239(the)S3410(disk)S3632(was)S3840(previously)S4342(labeled,)S4724(you)S4927(must)S5180(issue)S720 H1730 V1105(the)S1281(")S11 I1326(disklabel)S1765(-z)S11 R1844(")S1931(command)S2406(to)S2534(destroy)S2898(the)S3073(label)S3327(block)S3612(or)S3744(else)S3955(you)S4161(cannot)S4494(write)S4760(to)S4887(this)S5088(area)S5309(of)S720 H1860 V1105(this)S1346(disk)S1611(\(block)S1972(0\).)S2205(Failure)S2597(to)S2764(do)S2955(this)S3196(results)S3565(in)S3733(the)S3949(error)S4242("Read-only)S4826(\256le)S5049(system")S720 H1990 V1105(\(errno=EROFS\))S1846(being)S2123(returned)S2520(on)S2663(write)S2921(requests.)S720 H2221 V11 C984(Syntax:)S720 H2351 V1248(of=filename)S2370(The)S2634(output)S3096(file)S3426(to)S3624(write.)S720 H2582 V12 B720(4.3)S942(Pattern)S1364(File)S1594(")S12 I1661(pf=)S12 B1837(")S1940(Option.)S720 H2748 V11 R970(This)S1201(option)S1519(speci\256es)S1933(a)S2017(pattern)S2357(\256le)S2534(to)S2656(use)S2838(for)S3001(the)S3171(data)S3389(pattern)S3729(during)S4052(testing.)S4443(This)S4675(option)S4993(overrides)S720 H2878 V720(the)S890(")S11 I935(pattern=)S11 R1328(")S1409(option)S1727(and)S1921(allows)S2244(you)S2445(to)S2567(specify)S2919(specialized)S3441(patterns.)S3885(The)S4091(only)S4322(restriction)S4802(to)S4923(this)S5118(option)S720 H3008 V720(is)S847(that)S1065(the)S1252(entire)S1554(\256le)S11 I1748(must)S11 R2009(\256t)S2156(in)S2296(memory.)S2777(A)S2910(bu)S3020 H (f)show 11 -.5 mul h (f)show11 R3088(er)S3226(is)S3354(allocated)S3803(to)S3943(read)S4184(the)S4372(entire)S4675(pattern)S5033(\256le)S5228(into)S720 H3138 V720(memory)S1119(before)S1430(testing)S1757(starts)S2022(so)S2153(performance)S2737(is)S2844(not)S3018(a)S3066 H (f)show 11 -.5 mul h (f)show11 R3134(ected)S3397(by)S3540(reading)S3901(the)S4068(pattern)S4405(\256le.)S720 H⌨️ 快捷键说明
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